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Combustion Noise Prediction Inside Diesel Engine
Technical Paper
1999-01-1774
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In diesel engines, combustion is found to be a significant noise excitation. However, the aim of the present study is to introduce a concept by which all the engine noise sources can be classified. A special test rig has been installed for this reason which enables simultaneous acoustic measurements, in addition to those related to thermodynamic measurements. The procedure for accurate determination of direct and indirect combustion noise is explained based on a 3D multi-zone steady-state interior-exterior acoustic problem. The predicted direct combustion noise is considered to be due to combustion noise point source within the engine cylinder enclosure, and according to boundary element method (BEM). Results indicate that the proposed combined experimental-prediction approach is a reasonable approximate technique for the separation of mechanical, direct combustion and indirect combustion noise from the total engine noise. However, the influence of some thermodynamic parameters such as ignition timing, valve timing, compression ratio, air/fuel ratio ..etc can be investigated in future, and consequently better control for all the engine noise component can be made.
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Saad, A. and El-Sebai, N., "Combustion Noise Prediction Inside Diesel Engine," SAE Technical Paper 1999-01-1774, 1999, https://doi.org/10.4271/1999-01-1774.Also In
References
- Abou-El-Seoud, S. A. “Vibration Response Analysis Leading to Predict Engine Noise” Bull. of the Faculty of Engg. Assiut Univ. Assiut, Egypt 12 1 1984
- Abou-El-Seoud, S. A. “Relation Between Noise and Basic Structural Vibration of Agricultural Diesel Engine” Bull. of the Faculty of Engg. Minia Univ. Minia, Egypt 1982
- Russell, M.F. “Control of Noise From Conventional Diesel Engines” paper No. 11, Inst. of physics, Annual conf. University of Aston B'ham, U. K. Sept. 17-19 1974
- Austen, A. E. W. Priede, T. “Origins of Diesel Noise” Symposium on Engine Noise and Noise Suppression Instn. Mech. Engrs. London 1958
- Priede, T. “Some Studies Into Origins of Automotive Diesel Engine Noise and its Control” 11 th Automobile Technicher Kongress June 1966 Munchen F.I.S.T.A. 1966
- Endres, H. “Combustion System Development Trends for Multi-Valve Gasoline Engines” SAE 900652 1990
- Wolschendorf, J. Dumholz, M. Schmillen, K. “The IDI Diesel Engine and its Combustion Noise Variations” SAE 910228 1991
- Kirkup, S. M. Tyrell, R. J. “Computer- Aided Analysis of Engine Noise” Int. J. Of Vehicle Design 130 4 388 402 1992
- Suzuki, S. “Boundary Element Analysis of Structural-Acoustic Problems with Complicated Boundary Conditions” Advances in Boundary Elements Brebbia C. A. Connor J. Springer- Verlag 2 341 353 1989
- Wilhelm, M. Alt, N. Wiehagen, N. “Optimization of SI Combustion Noise - Development Process and Basic Analysis” IMechE Conference Transactions 1998-5, Vehicle Noise and Vibration Prof. Eng. Pub. UK 1998
- Gregotsch, K. Herrmann, R. KodweiB, J. “Engine Acoustics in Rapid-Combustion 4- Valve SI-Engines- A contribution to the Acoustic Tuning of the Combustion Process” SAE 920411 1992
- BEASY Software Computational Mechanics Beasy Co. Southampton, U.K. Billerica, MA, USA 1996
- Seybert, A. F. Wu, T. W. Li, W. 1989 “Acoustic Prediction for Structural Radiation and Propagation in Automotive Applications,” SAE 891169 1989