Adjunct Associate Professor
MSc (Lough); PhD (Leics); CEng; RPE; FRAeS; MIMechE; MHKIE; CMILT; FHKQMA
: FJ617
: 3400-2567
: 2365-4703

Area of Specialization

Civil aviation operations and safety; Airport engineering and hazard assessment; Air transport logistics; Aircraft engineering education and training; Marine technology; Quality management of Picture Archiving and Communications System.

Short Description

Dr Wong received his MSc and PhD degrees from the Loughborough University and the Leicester University respectively. For his MSc course, he studied “loss prevention” with Prof. Frank Lees and Prof. Trevor Kletz and his “dezincification” dissertation was supervised by Prof. David Gabe. For his PhD thesis in the area of building services life cycle costing, he was supervised by Prof. George Norman and his mentor was Prof. Roger Flanagan of the Reading University.

Prior to joining the Mechanical Engineering Department in September 1980, he worked for the HK Civil Aviation Department in the areas of air traffic flight services, flight crew licensing and examinations, and flight operations safety. During this period he completed the CAA Basic Airways and Approach Control Course at the NATS College of ATC, the ICAO (International Civil Aviation Organization) Flight Operations Officer and the 18th UK CAA Airworthiness Course. With the aid of the Cathay Pacific Airways Lockheed L1011 Tristar Conversion Course he passed the HKCAD L1011 Technical Examination in 1978. Soon after joining the Mechanical Engineering Department, he was invited by ICAO as Visiting Lecturer in Airport Mechanical/Electrical Maintenance (ICAO Technical Assistance Programme in the Philippines 1981).

Dr Wong was elected an Associate Fellow of the Society of Licensed Aircraft Engineers and Technologists in 1977, Member of the Chartered Institute of Transport in 1978, Member of the Institution of Mechanical Engineers in 1982, Member of the HKIE in 1986, Fellow of the Royal Aeronautical Society in 1997.

Besides being the Programme Leader of PolyU Higher Diploma in Aeronautical Engineering, HD in Mechanical Engineering and HD in Computer-Aided Engineering, he was the Course Manager of Massey University’s Master of Aviation (MAv) programme (in collaboration with PolyU). Graduates of this programme were senior professionals from the HK CAD and the aviation industry, e.g. DGCA, senior air traffic control officers, senior operations officer, assistant airport general manager, CAD medical examiner, senior engineers, lawyers (foreign and local), etc.   Speakers for the MAv seminars included world-renowned experts such as Prof. Patrick Hudson (Delft University of Technology), Prof. Graham Hunt (Embry-Riddle Aeronautical University), Prof. Graham Braithwaite (Cranfield University), Dr. David Pang of Airport Authority Hong Kong, etc.

Besides a reviewer for the “International Journal of Production Research” and “Construction Management and Economics”, he is on the editorial board of the International Journal of Industrial Engineering – Theory, Applications and Practice and Asian Journal on Quality.

With regard to the newly offered Aviation Stream of the MSc in Mechanical Engineering programme, he initiated four subjects: Airworthiness and Maintenance, Operations Research in Aviation, Human Factors in Aircraft Maintenance and Advanced Avionics Systems.

Professional Services

1983-date Founding Treasurer, Royal Aeronautical Society (HK Branch).
1996-date Member of Editorial Board, International Journal of Industrial Engineering-Theory, Applications and Practice.
2002 Vice Chairman, The Hong Kong Institute of Marine Technology.
2001-2002 Member, Education and Examination Committee, HK Institution of Engineers
2002-date External Examiner, Higher Diploma Programmes, Department of Engineering, Institution of Vocational Education (Tsing Yi).
2004-date Program Committee of ISSAT International Conferences on Reliability  and Quality in Design.
2005-date Member, China Council for the Promotion of Six Sigma.
2005-date Industrial Advisor (Education), Six Sigma Society of Hong Kong.
2005 Chairman, Organizing Committee, The 11th HK Quality Management and the 1st Six Sigma Convention, June 18-20, 2005, Hong Kong Exhibition and Convention Centre (Organizers: HK Productivity Council, the HK Quality Management Association and Six Sigma Institute).
2005 Member, Assessment Panel for Quality Technology Awards in China (China Association for Quality, Beijing).
2007 Co-Chairman, 2007 Scilab Contest in China and International Workshop on Open Source Software Research, Development and Industrial Application, 11-13 May, 2007, Foshan.
2007 Program Chair, ISSAT International Conference on Modeling of Complex    Systems and Environments, HCM City, Vietnam, July 16-18, 2007.
2007-date RAeS(HK) Spokesman on Risk Assessment and Aviation Safety issues.
2007-8 Organization of the HK Air Cadet Corps Advanced Aviation Education Programme in PolyU.
2010 Hon. Advisor (Training) of the China Aircraft Services Ltd.
2011 Founding Member of the HKIE Aircraft Engineering Discipline.
2012 Organizing Committee, The International Conference on Automatic Control and Artificial Intelligence, Xieman.

Research Projects

Dr Wong have been the Principal Investigator of four General Research Fund (GRF) Projects (Research Grant Council) and Chief Supervisor of 1 Teaching Company Scheme (Innovation Technology Commission):


  1. Effect of Laser-clad Cross-rib Geometry on Heat Transfer Enhancement (PolyU5196/99E)
    • Co-Investigators: Prof. Wenquan Tao, (Academician of Chinese Academy of Sciences & President of Xi’an Jiaotong-Liverpool University) and Prof. C.W. Leung, ME.
  2. Effect of Corrosion and Torque on Plasma-sprayed and Laser-remelted Copper Busbar Joints (POLYU5171/01E)
    • Co-Investigator: Prof. J.M.K. MacAlpine, EE
  3. Thermal Design of Gas-fired Cooktop Burners Utilizing Impinging Premixed Flame (Polyu5276/04E)
    • Co-Investigator: Prof. C.W. Leung, ME
  4. Modeling and Simultaneous Optimization of Premixed Multi-slot Jet Efficiency and Greenhouse Gas Emissions (Polyu5316/08E)
    • Investigator: Prof. C.W. Leung, ME 


  1. Hard Chrome Plating for Piston (Teaching Company Scheme collaborated with the Brigantine Services Ltd).

Selected Research Projects

Project 1:

Modeling and Simultaneous Optimization of Premixed Multi-slot Jet Efficiency and Greenhouse Gas Emissions

Funding Source:

General Research Fund

Investigators:  T.T. Wong & C.W. Leung

Abstract of the Project:

The literature on domestic gas ranges research is few and attempts to deal with limited number of parameters in an unconcerted manner. Comparing with the literature about direct research on domestic gas ranges, the study on impinging flame jets – which can be any type of gas cooker – has been more active. Effects of the Reynolds number, the nozzle-to-plate distance and equivalence ratio of the air/fuel mixture have been extensively investigated. However, most of the studies available in the literature have been conducted with round burners. Very little work has been done on rectangular slots with different sets of jet-array geometrical and flow parameters. In particular, the combined effects of jet-array parameters such as jet orientations and jet-to-jet spacing on the combustion efficiency and greenhouse gas emissions are yet to be explored.

A row of three flame jets was chosen for the study because it provides the most basic arrangements commonly found in domestic and commercial cooktop burners. The configuration of a central jet with two side jets is similar to the situation of any jet in a jet array. The central jet experiences interference from its two neighboring jets and the effect can be used to characterize the behavior of any jet in a jet array except that at the free end, which is affected by its neighboring jet from one side only.

The combustion efficiency and gaseous emissions of a jet array depend on several geometrical and flow parameters. In this study the geometrical parameters chosen were: jet orientation, aspect ratio of jet, jet-to-jet spacing and jet-to-plate distance, and the flow parameters chosen are: Reynolds number and equivalence ratio of the air/fuel jets. To estimate the nonlinear relationships between the input factors and the response variables, one needs at least 3 levels for each input factors. Based on three levels of the six experimental factors (i.e. before replications or blocking), the number of experiments to be carried out according to the traditional one-factor-at-a-time approach would be 36, i.e. 729. To allow an estimate of the experimental error blocking might be needed and some runs would be replicated as necessary to augment the response surface design experiments. To enhance resources utilization, an efficient experimental design has been introduced in this study – the Response Surface Methodology. It is expected that before replications or blocking, a total of 91 experimental runs would be needed.

For this project the primary aim is to develop empirical models for predicting each of the above-mentioned combustion responses, with an emphasis on evaluating the individual and combined effects of all the jet-array and flow parameters. This would be achieved through the application of nonlinear regression and analysis of variance techniques. Another aim is to find thorough discriminant analysis whether the jet-array geometries and flow conditions under study might be divided into groups of distinct combustion attributes. The third aim is to characterize the response surfaces developed for the purpose of optimizing the conflicting responses simultaneously, viz. maximizing combustion efficiency and minimizing green house gas emissions. It is anticipated that findings of this project would prove useful for the sustainable design of gas-fired cooktop burners.

Project 2:

Impinging Premixed Flame Jet – Influence of Impingement Plate on Heat Transfer Characteristics

Funding Source:

The Hong Kong Polytechnic University – PhD project

Supervisor:   T.T. Wong & C.W. Leung

Abstract of the Project:

The PhD research project was conducted to investigate the material and mechanical properties of an impingement surface that would lead to rapid heat transfer rate and little material deformation under the action of a flame jet system. Experimental studies were performed to study the heat transfer characteristics of an impingement flame jet system consisting of a premixed butane/air circular flame jet impinging vertically upward upon a horizontal rectangular plate at laminar flow condition. The effectiveness of different roughened surfaces was investigated under different flame jet conditions, including a range of Reynolds number and equivalence ratio of the air/fuel jet and varying nozzle-to-plate distance. The investigation mainly focused on three aspects, viz. thermal conductivity, surface emissivity and surface roughness. The following photos show the experimental set-up and a typical flame appearance.

Selected Journal Publications

  1. M.L. Chan, K.T. Lau & T.T. Wong and Cardona, Francisco. Interfacial bonding characteristic of nanoclay/polymer compositesApplied Surface Science, 258(2). 860-864, 2011.
  2. Z. Zhao, D.W. Yuen, C.W. Leung & T.T. Wong. Thermal performance of premixed impinging circular flame jet array with induced-swirl, Applied Thermal Engg, 29(1), 159-166, 2009.
  3. A. Ning, H. C. W. Lau, Y. Zhao & T. T. Wong, Fulfillment of Retailer Demand by Using the MDL-Optimal Neural Network Prediction and Decision Policy, IEEE Transactions on Industrial Informatics, 5(4), 495-506, 2009.
  4. Z. Zhao, T.T. Wong and C.W. Leung. Influences of material properties on thermal design of impinging flame jets, Materials & Design, 29(1), 28-33, 2008.
  5. H.Y. Ling, K.T. Lau, Z. Su & E.T.T. Wong, Monitoring mode II fracture behaviour of composite laminates using embedded fiber-optic sensors, Composites Part B: Engineering, 38(4), 2007, p.488-497.
  6. H.B. Li, T.T. Wong, C.W. Leung & S.D. Probert, Thermal performances and CO emissions of gas-fired cooker-top burners, Applied Energy, 83(12), 1326-1338, 2006.
  7. Z. Zhao, T.T. Wong, C.W. Leung, & S. D. Probert, Wok Design: Thermal performance influencing parameters, Applied Energy, 83(4), 387-400, 2006.
  8. T.T. Wong, J.M.K. MacAlpine, et al. The effect of laser treatment on the mechanical and electrical properties of busbar joints. Intl Jr of Materials & Product Technology, 21 (6): 473-486, 2004.
  9. Z. Zhao, T.T. Wong & C.W. Leung, Impinging premixed butane/air circular laminar          flame jet –– influence of impingement plate on heat transfer characteristics, In. Jr. Heat Mass Transfer, 47, 5021–5031, 2004.
  10. T.T. Wong, C.W. Leung, Z.Y. Li and W.Q. Tao, Turbulent Convection of Air-cooled Rectangular Duct with Surface-mounted Cross-ribs”, In. J. Heat Mass Transfer, 46, 4629-4638, 2003.
  11. H.C.W. Lau & T.T. Wong, Partner Selection and Information Infrastructure of a Virtual Enterprise Network, International Journal of Computer Integrated Manufacturing, 14(2), 186-195, 2001
  12. L.B. Wang, W.Q. Tao, Q. W. Wang and T.T. Wong, Experimental study of developing turbulent flow and heat transfer in ribbed convergent/divergent square ducts, Int. Jr. Heat Fluid Fl., 22(6), 603-613, 2001.
  13. G.Y. Liang, T.T. Wong & J.M.K. MacAlpine, A study of wear resistance of plasma-sprayed and laser-remelted coatings on aluminium alloy, Surf Coat Tech, 127(2-3), 233-238, 2000.
  14. H.C.W. Lau, T.T. Wong and K.F. Pun, Neural-fuzzy modeling of plastic injection molding machine for intelligent control, Expert Syst Appl, 17 (1), 33-43, 1999.

Book Chapters/Co-author

  1. C. K. Tong, & E. T.T. Wong. “Picture Archiving and Communication System for Public Healthcare”. In Management Association, USA, I. (Ed.), Clinical Technologies: Concepts, Methodologies, Tools and Applications (3 vol). pp. 2173-2182, 2011.
  2. T.T. Wong. PMA “Supplier Selection Using the Mahalanobis Taguchi System”. In G.D. Putnik & M.M. Cunha(Eds), Encyclopedia of Networked and Virtual Organizations, pp.1230-1237, Hershey: Information Science Reference. 2008.
  3. S. Li, E.T.T. Wong, C. Gomez, A. K.T. Lau, X.B. Wang & L.B. Mo. Scilab Research, Development and Applications. 231 pages. Beijing: Tsinghua University Press. 2008.
  4. C.K.S. Tong & E.T.T. Wong. Governance of Picture Archiving and Communications Systems – Data Security and Quality Management of Filmless Radiology. 336 pages. IGI Global, 2008.
  5. E.T.T. Wong & C.K.S. Tong.  “3G Mobile Medical Image Viewing”. In. L. Al-Hakim(Ed.), Web mobile-based applications for healthcare management, pp.300-315. Hershey:IRM Press, 2007.
  6. T.T. Wong. “Neural Data Mining System For Trust-Based Evaluation in Smart Organizations”. In I. Mezgar (Ed.), Integration of ICT in Smart Organizations, pp.159-185. Hershey: Idea Group Publishing, 2006.
  7. T.T. Wong, C.W. Leung, D.Y. Liu, and H.B. Li. “Sustainable Cooktop Design Using Scilab”. In S. Li, et al (Eds), Scilab Research, Development and Applications, pp.317-326, Beijing: Tsinghua University Press, 2006.
  8. J. Chan, R. Kwan, and E. Wong. Quality Management: A New Era. Singapore : World Scientific, 204 pages, 2005..
  9. E.T.T. Wong & L.T.S. Fok. “A Six Sigma Implementation Plan for SMEs”, In Chan, J., Kwan, R. & Wong, E.. (Ed.), Quality Management: A New Era, pp. 65-79, Singapore: World Scientific. 2005.
  10. C.K.S. Tong & E.T.T. Wong. “Information Security Management in Picture Achiving and Communication Systems for the Healthcare Industry”. In M. Pagani(Ed.) Encyclopedia of Multimedia Technology and Networking, pp. 396-403, Hershey: Idea Group Reference, 2005.
  11. T.T. Wong. “Trust in Virtual Enterprises”. In M. Khosrow-Pour (Ed) Encyclopedia of Information Science and Technology pp.2902-2909. Hershey: Idea Group Reference, 2005.
  12. H.C.W. Law & E.T.T. Wong. “Applications of Information Technology in Agile Manufacturing”. In A. Gunasekaran(Ed.), Agile Manufacturing: 21st Century Manufacturing Strategy, pp.205-228, UK: Elsevier, 2001.
  13. T.T. Wong. “Weibull Estimation: A Moment-Based Approach”. In A. Mital(Ed.) Industrial Engineering Applications and Practice: Users Encyclopedia, [CD-ROM], 1999.

Selected Conference Papers

  1. T.T. Wong, C.W. Leung & M.C. Wong, “Sustainable Design of Impinging Premixed Slot Jets”. Proc. of ICEE 2010: International Conference on Energy and Environment, Paris, France, July 28-30, pp.550-554, 2010.
  2. M.C. Wong, T.T. Wong & C.W. Leung, Modeling of Impinging Premixed Multi-slot Jet efficiency and Greenhouse Gas Emissions, Proc. of the 7th Asia-Pacific Conference on Combustion, National Taiwan University, Taipei, Taiwan, 24-27 May, pp.245, 2009.
  3. T.T. Wong, C.W. Leung, D.Y. Liu & H.B. Li, Application of multi-objective neural-network optimization to gas-fired cooktop design, Proc. of the 6th International Conference on Quality, Reliability and Maintenance, March 22-23, Oxford, UK, pp.259-263, 2007.
  4. T.T. Wong & K.S. Pang, Human Factor Modeling in Aircraft Maintenance, Proc. of ISSAT International Conference on Modeling of Complex Systems and Environments, July 16-18, HCM City, Vietnam, pp.81-85, 2007.
  5. T.T. Wong & C.W. Leung, Sustainable Cooktop Design: A Neural Factorial Design Approach, Proc. of ISSAT International Conference on Modeling of Complex Systems and Environments, July 16-18,HCM City, Vietnam, pp.101-105, 2007.
  6. T.T. Wong, C.W. Leung, W.L. Lo & Y.W. Chan, Statistical Modeling of Gas Cooktop Efficiency and Greenhouse Gas Emissions, Proc. of ISSAT International Conference on Modeling of Complex Systems and Environments, July 16-18, HCM City, Vietnam, pp.131-135, 2007.
  7. T.T. Wong, The Human Side of Quality, Proceedings of the 1st Pan Pearl River Delta Quality Forum, (Invited Paper) October 25-27, Shenzhen, P.R. China, pp. 97-106. 2006.
  8. T.T. Wong, C.W. Leung, H.B. Li & D.Y. Liu. Effect of Flame Impingement on Thermal Performance and CO Emissions of Gas-Fired Domestic Burners. Proc. of the 12th ISSAT International Conference on Reliability and Quality in Design, August 3-5, Chicago, USA, pp.103-107, 2006.
  9. E.T.T. Wong. Risk Modeling for Airport Hazard Management, Proceedings of the Airports Council International-Asia Pacific Region “Best Practice Seminar & CEO Forum”, (Invited Paper) [CD-ROM], April 18-21, Beijing, 2005.