S. H. Yonak
Dept. of Mech. Eng. and Appl. Mech., 120 W. E. Lay Automotive Lab., Univ. of Michigan, Ann Arbor, MI 48109-2121
J. M. Novak
Ford Motor Co., Dearborn, MI 48121
Following an earlier work [A. Selamet and J. M. Novak, J. Acoust. Soc. Am. 97, 3393 (1995)], the present study investigates the performance of a Helmholtz resonator installed in the induction system of a Ford 3.0 Liter V6 Vulcan engine in a dynamometer test facility. Earlier findings with the production manifold are compared with the current results obtained with a modified prototype manifold in an attempt to determine the extent of multidimensional wave dynamics. The induction system is instrumented with fast-response piezoresistive transducers to capture the temporal and the spatial variation of air pressure. Measured insertion loss characteristics of the silencer are then discussed in comparison with the predictions from a nonlinear computational fluid dynamics approach in the time domain.