Pressure Drop and Flow Loss Approximation by Comparison between Mathematical Model and Numerical Model of a Simplified Fluid Mount

Vibration isolators like hydraulic engine mounts are employed in the automotive industry to mitigate the effect of vibration and noise produced in the vehicle by the engine. Several analyses on the transient response of the hydraulic engine mounts have been carried out in literature to improve the performance of the device. In this paper, efforts have been taken to study the oscillatory fluid flow behaviour of the working fluid inside these mounts. A simplified fluid mount model is considered, and its respective numerical and mathematical models are developed to study the effect of input parameters such as frequency and displacement on pressure loss across the inertia track. Comparison of the inertia track pressure loss obtained from both the models provides validation on the modelling approach. This approach can be further utilized to develop a correlation between, the input displacement, the inertia track geometry, the fluid density and viscosity and the pressure loss across the inertia track in hydraulic engine mounts and thereby enhancing the damping efficiency of these mounts.