Abstract:Numerical computation was performed for airflow regeneration noise in exhaust muffler with split-flow gas hedging, and the correctness of the computation method was verified with tests.Taking the total sound pressure level of airflow regeneration noise as the response value, the test for airflow regeneration noise was designed using the software Design-Expert.According to regression analysis, a mathematical model of total sound pressure level with test factors including diameter of internal cavity, shape and center distance of hedging hole, cone angle of internal cavity split-flow unit as well as airflow speed was established using Box-Behnken test design scheme, and the model’s significance was tested.Influence laws of second-order interaction of different factors on airflow regeneration noise were deeply analyzed.The results showed that with increase in airflow speed, airflow regeneration noise increases significantly, and its gradient is more than 1; shape and center distance of hedging hole have a significant impact on airflow regeneration noise, and when shape of hedging hole is rectangular and center distance of hedging hole is average value, airflow regeneration noise is smaller; cone angle of inner cavity split-flow unit and diameter of inner cavity have smaller influence on airflow regeneration noise; the optimal test conditions are obtained by taking airflow regeneration noise as the optimization index.
张海军,苏赫,武佩,宗哲英,张永安,薛晶. 分流气体对冲排气消声器气流再生噪声模型研究[J]. 振动与冲击, 2021, 40(9): 63-70.
ZHANG Haijun, SU He, WU Pei, ZONG Zheying, ZHANG Yong’an, XUE Jing. Noise model of airflow regeneration in exhaust muffler with split-flow gas hedging. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(9): 63-70.
[1]2011—2020年我国能源科学学科发展战略报告[R].北京:国家自然科学基金委,中国科学院能源科学学科发展战略研究组,2010年.
[2]XIE X Z. Noise optimization design on the exhaust muffler of a special vehicle based on the improved genetic algorithm [J].Journal of Vibroengineering, 2015, 17(8):4625-4639.
[3]REDDY K P K, FATIMA S, MOHANTY A R.A new sound quality metric for the design of engine exhaust mufflers [J].Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2018, 232(2):254-263.
[4]XIE X L, GAO F, HUANG X Y.Numerical optimization of flow noises for mufflers based on the improved BP neural network [J].Journal of Vibroengineering, 2016, 18(4): 2626-2640.
[5]赵海军,邓兆祥,李沛然.穿孔管式消声单元气流再生噪声总功率模型[J].振动与冲击,2011, 30(8):118-122.
ZHAO Haijun, DENG Zhaoxiang, LI Peiran.Total power model of flow noise generation in perforated duct muffler element [J].Journal of Vibration and Shock, 2011, 30(8): 118-122.
[6]刘通.汽车消声器气流再生噪声多位分析[D].重庆: 重庆理工大学,2017.
[7]刘海涛.消声器膨胀腔气流再生噪声产生机理及抑制研究[J].振动与冲击,2019, 38(16): 192-199.
LIU Haitao. A study on generation mechanism and suppression of airflow regeneration noise in expansion the chamber of a muffler [J].Journal of Vibration and Shock, 2019, 38(16): 192-199.
[8]DESANTES J M, TORREGROSA A J, BROATCH A.Experiments on flow noise generation in simple exhaust geometries [J].Acustica united with Acta Acoustica, 2001, 87 (1):46-55.
[9]JEBASINSKI R, LENG S, JESS M, et al.Investigation on whistle noise in automotive exhaust system mufflers [C]∥SAE Paper.Detroit,Mi:2005-01-2361, 2005.
[10]ENGLISH J E, HOLLAND R K.Aeroacoustic sound generation in simple expansion chambers [J].Journal of the Acoustical Society of America, 2010, 128(5) : 2589-2595.
[11]赵海军,梁凯,李洪亮,等.基于湍涡耗散的穿孔板消声器气流再生噪声模型[J].内燃机学报,2019, 37(2):179-185.
ZHAO Haijun, LIANG Kai, LI Hongliang, et al.Flow regenerated noise model of perforated plate muffler based on turbulence eddy dissipation [J].Transactions of CSICE, 2019, 37(2):179-185.
[12]ZHANG Y A, WU P, MA Y H.Analysis on acoustic performance and flow field in the split-stream rushing muffler unit [J].Journal of Sound and Vibration, 2018, 430: 185-195.
[13]苏赫,马彦华,武佩,等.对冲孔对分流气体对冲消声单元压力损失的影响[J].内燃机学报,2017, 35(2) :178-184.
SU He, MA Yanhua, WU Pei,et al.Effects of rushing hole on pressure loss of the split-stream-rushing muffler unit [J].Transactions of CSICE, 2017, 35(2):178-184.
[14]苏赫.柴油机分流气体对冲排气消声单元气流速度分析研究[D].呼和浩特:内蒙古农业大学,2017.
[15]霍黎明,武佩,苏赫,等.分流气体对冲消声器内流场及再生噪声分析[J].噪声与振动控制,2019, 39(2): 215-221.
HUO Liming, WU Pei, SU He, et al.Analysis of internal flow field and regeneration noise in the split-stream-rushing muffler [J].Noise and Vibration Control, 2019, 39(2):215-221.
[16]盛美萍,王敏庆,孙进才.噪声与振动控制技术基础[M].北京:科学出版社,2007.
[17]BRENTNER K, FARASSAT F.An analytical comparison of the acoustic analogy and Kirchhoff formulations for moving surfaces [J].AIAA Journal, 1998, 36(8): 1379-1386.
[18]FFOWCS-WILLIAMS J E, HAWKINGS D L.Sound generation by turbulence and surfaces in arbitrary motion [J].Proc Roy Soc London, 1969, 264(1151): 321-342.
[19]JALAL N, ZIDI M.Influence of experimental conditions on visco-hyperelastic properties of skeletal muscle tissue using a Box-Behnken design [J].Journal of Biomechanics, 2019, 85: 204-209.