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Development of Exhaust Orifice Noise Optimization Technology Using Light-CAE

Article of Honda R&D Technical Review Vol.18 No.2

Summary

A prediction optimization technology for exhaust orifice noise and exhaust gas flow rate has been developed as an easy-to-use development support tool for designers.
The accuracy of predicted exhaust orifice noise was increased by using the Lighthill analogy and by correcting for airflow noise using empirical values. Combining this optimization technology with a Light-CAE system enables the relationship between the design parameters and the target values of orifice noise and exhaust gas flow rate to be represented by an approximation function. It also allows designers to carry out analyses in real time. As Light-CAE systems can be easily used in the initial design phase, this technology is positioned as a product development support tool.

Reference

(1) Kuriyama, T.: Strategic CAE to Shorten Development Time - Power CAE and Light CAE, Journal of Society of Automotive Engineers of Japan, Vol. 51, No. 4, p. 79-85 (1997)
(2) Shapiro, A. H.: The Dynamics and Thermodynamics of Compressible Fluid Flow, Vol. 1, The Ronald Press Company (1954)
(3) Sakurai, M.: Numerical Simulation of Exhaust Pulsating Flow & Orifice Noise, Review of Automotive Engineering, Vol. 27, No. 1, p. 151-154 (2006)
(4) Sakurai, M., Kasajima, Y.: Computational Simulation of Exhaust Pulsating Flow & Orifice Noise (Third Report), JSAE Annual Congress Proceedings, No. 175-06, p. 10-14 (2006)
(5) Ricardo-WAVE User’s Manual
(6) Goldstein, M. E.: Aeroacoustics, p. 311 (1991)
(7) Sakurai, M., Tanaka, K., Kasajima, Y.: Clarification of Mechanism of Exhaust Orifice Noise via Exhaust Pulsating Flow Simulation, Honda R&D Technical Review, Vol. 17,
No. 2, p. 77-83
(8) Box, G.E.P., Wilson, K. B.: On the Experimental Attainment
of Optimum Conditions, Journal of the Royal Statistical Soc.,
B-13, p. 1-45 (1951)

Author (organization or company)

Masato SAKURAI(Automobile R&D Center)、Hideyuki YOSHIMOTO (Automobile R&D Center)

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