This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Experimental and Theoretical Evaluation of a Toroidal Combustion Chamber for Stratified Charge Engines
Annotation ability available
Sector:
Language:
English
Abstract
Maximum efficiency of cyclic combustion engines (CCE) is achieved when using stratified charge and high compression ratio with controlled air circulation and combustion. A description is given of a varying-area, toroidal-shaped combustion chamber designed to achieve the above objectives by: obtaining initial circulatory air motion induced by the piston late in the compression stroke; increasing this piston-induced velocity using the momentum of fuel injected tangentially to the center line of the toroid; and by using combustion to further increase the circulation rate. Four combustion chamber configurations were studied in a bomb with zero initial air velocity to ascertain whether significant rotation could be achieved by injection and combustion. Gas pressure was measured and high speed photographs were taken of the injection and combustion process. The ideal situation, at full load, is to have one rotation of the gas during the time allocated to combustion. The experimental results, with zero initial velocity, show that fuel momentum plus combustion produces from one-half to three-quarters of a rotation in the available time. Modeling suggests that the use of initial, piston-induced velocities would result in the desired one rotation in the available time.
Recommended Content
Authors
Citation
Quiros, E., Adams, J., Otis, D., and Myers, P., "Experimental and Theoretical Evaluation of a Toroidal Combustion Chamber for Stratified Charge Engines," SAE Technical Paper 900606, 1990, https://doi.org/10.4271/900606.Also In
References
- Adams, Jack W. 1986 “Air Circulation in a Toroidal Combustion Chamber Caused by Fuel Momentum and Combustion Energy,” Mechanical Engineering University of Wisconsin Madison
- Anderson, D.A. Tannehill, J.C. Pletcher, R.H. 1984 “Computational Fluid Mechanics and Heat Transfer,” McGraw Hill, New York
- Beck, N.J. Barkheimer, R.L. Calkins, M.A. Johnson, W.P. Weseloh, W.E. 1984 “Direct Digital Control of Electronic Unit Injectors SAE 840273
- Clerk, D. 1909 “The Gas and Petrol Engine,” 191 John Wiley New York
- Dwyer, H.A. Allen, R. Ward, M. Karnopp, D. Margolis, D. 1974 Shock Capturing Finite Difference Methods for Unsteady Gas Transfer,” AIAA paper no. 74-521
- Ha, J.Y. Sato, G.T. Hayashi, A. Tanabe, H. 1983 “Investigation on the Initial Part and the Spray Formation Relay of Direct Spray,” SAE 830451
- Hawthorne, W.R. Olson, W.T. 1959 “Design and Performance of Gas Turbine Power Plants, Jet Propulsion Engines,” XI Princeton University Press 1959
- Karandikar, A.R. Ganesan, V. Murthy B.S. 1978 “Comparison of Two Bluff Bodies on the Recirculation Phenomena in the Primary Zone of an Isothermal Combustion Chamber,” Indian Journal of Technology 16 July 1978 275 277
- MacCormack, R.N. 1969 “The Effect of Viscosity on Hypervelocity Impact Cratering,” AIAA Paper 69-354
- Quiros, Edwin N. 1989 “Control of Fresh Fuel-Air Mixing in a Toroidal Engine Combustion Chamber,” Mechanical Engineering University of the Philippines
- Smith, C.W. Aircraft Gas Turbines John Wiley and Sons New York