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Quality Assurance for Combustion Chamber Thermal Boundary Conditions - A Combined Experimental and Analytical Approach
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Abstract
The increasing cost of prototype engine design and development has placed new emphasis on the importance of accurate analysis of combustion chamber components. A method to assess and improve the quality of thermal boundary conditions is described. The integration of analytical approaches and experimental techniques to validate and improve thermal boundary conditions is dependent on continuous improvement of theoretical models and correlation with measured results. To monitor and improve quality, it is important to operate a closed loop of prediction, measurement and feedback to the analysis system.
The development of advanced computational methods, particularly the Finite Element Method (FEM) has increased the opportunities to include detailed component thermal analysis in combustion chamber design studies. In using FEM, much emphasis is traditionally placed on “accurate” mesh generation in order to minimise element distortion and optimise element polynomial order. Whilst this is important experience has shown that often the most significant source of error in thermal analysis is associated with incorrectly specified boundary conditions.
The process of calculating and validating boundary conditions for gas side combustion chamber heat transfer, material thermal conductivity and coolant side heat transfer characteristics are discussed in detail. The important principles involved in predictive models including spatially resolved in-cylinder definitions are highlighted. The design of new instrumentation and test techniques are also described with emphasis placed on minimum intrusion and the importance of recordable calibration systems. Results from direct and indirect injection diesel engines together with data from modern tumbling multi-valve gasoline engines are presented and discussed.
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Owen, N., Robinson, K., and Jackson, N., "Quality Assurance for Combustion Chamber Thermal Boundary Conditions - A Combined Experimental and Analytical Approach," SAE Technical Paper 931139, 1993, https://doi.org/10.4271/931139.Also In
References
- Dinwoodie J. “Automotive Applications for MMCs based on Short Staple Alumina Fibres” SAE 870437
- Spengler W.G. Young W.B. “Techniques to Upgrade Heavy Duty Aluminium Pistons” SAE 860162
- Bernard L. Stabielli V. Taricco F. DiCarlo S. “Metal Matrix Composites in the Reinforcement of Diesel Engine Cylinder Heads” FISITA Paper 905027
- Koyama M. Miyake J. Sakaguchi K. “Development of the Partial Strengthening Method for Automobile Aluminium Alloy Castings by TIG Surface Remelting” SAE 891989
- Adams D.R. Revello P.L. Van Ruiter P. Travaille J. “Enhancement of Crown and Ring Groove Durability” Paper No. 3 AE Piston Symposium 1986
- Radovanovic R.S. Kamo R. Durfane K.F. “Tribological Investigations for an Insulated Diesel engine” SAE 920319
- Sutor P. Bryzik W. “Development of Advanced High-Temperature Liquid Lubricants” SAE 880015
- Kamo R. Bryzik W. “Performance and Durability of a Ceramic Coated Adiabatic Engine” American Society of Mechanical Engineers, paper 90-ICE-16
- Lowe A.S.H. Morel T. “A New Generation of Tools for Accurate Thermo-Mechanical Finite Element Analyses of Engine Components” SAE 920681
- Morel T. Keribar R. “A Model for Predicting Spatially and Time Resolved Convective Heat Transfer in Bowl-in-Piston Combustion Chambers” SAE 850204
- Woschni G. A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine” SAE Paper 670931 1967
- Annand W.J.D. “Heat Transfer in the Cylinder of Reciprocating Internal Combustion Engines” Proc. IMechE 177 36 973 996 1963
- Jackson N.S. Pilley A.D. Owen N.J. “Instantaneous Heat Transfer in a Highly Rated Dl Truck Engine” SAE 900692
- Van Gerpen J.H. Huang C. Borman G.L. “The Effects of Swirl and Injection Parameters on Diesel Combustion and Heat Transfer” SAE 850265
- Morel T. Wakiduzzaman S. Tree D.R. DeWitt D.P. “Effect of Speed, Load and Location on Heat Transfer in a Diesel Engine - Measurements and Predictions” SAE 870154
- Morel T. Keribar R. Blumberg P.N. “A New Approach to Integrating Engine Performance and Component Design Analysis through Simulation” SAE 880131
- Morel T. Rackmil C.I. Keribar R. Jennings M.J. “Model for Heat Transfer and Combustion in Spark Ignited Engines and Its Comparison with Experiments” SAE 880198
- Morel T. Keribar R. “Heat Radiation in Dl Diesel Engines” SAE 860445
- Alcock J.R. Robson J.V.B. Mash C. “Distribution of Heat Flow in High Duty Internal Combustion Engines” CIMAC 1957
- French C.C.J. “Taking the Heat Off the Highly Boosted Diesel” SAE 690463
- French C.C.J. “Piston Cooling” SAE 720024
- Dittus F.W. Boelter L.M.K. “University of California Publications Engineering” 1930 2 443
- Finlay I.C. Boyle R.J. Pirault J.P. Biddulph T. “Nucleate and Film Boiling of Engine Coolants Flowing in a Uniformly Heated Duct of Small Cross Section” SAE 870032
- Pischinger R. Krassing G. Wimmer A. “Experimental Methods to Determine Heat Transfer in Internal Combustion Engines” Eurotherm Seminar No. 15 IMFT Toulouse, France
- Bendersky D. “A Special Thermocouple for Measuring Transient Temperatures” Mechanical Engineering 75 1953
- Huppelshauser H. Renz U. “Simultaneous Local Heatflux and Velocity Measurements in a Four Stroke Motored Engine” Eurotherm Seminar No. 15 IMFT Toulouse, France