Design and Optimization of a Fuel Tank to Minimize the Fuel Sloshing using Perforated Baffles

Paper #:
  • 2018-01-0683

Published:
  • 2018-04-03
Abstract:
Fuel sloshing is a phenomena of shifting of the gasoline present in the fuel tank during any impulse excitation in a rigid bodies 6-Degree of Freedom. Acceleration, braking and cornering develops pitch, roll and yaw moments which induces the force of the fuel tank. These moments contributes to the developed surface phenomena inside the tank. Fuel sloshing results in fuel deprivation at pump, unnecessary noise and fatigue loading on the fuel tank. These attributes are concerning factor for the customer’s satisfaction and no individual would want to compromise over this factor. Various CAE methodologies has been developed in past few years to avoid the expensive testing and to predict the sloshing pattern. This work focuses on the development of Eulerian Multiphase Volume of Fluid model along with k-epsilon turbulence model. The baffle hole size were optimized for interrupted flow of fuel. Real time inertia sensor data was logged from a track and was used to adapt the design to real case scenario. Thus adding the non-linearity in the model consequently attains non-harmonic excitations. The objective being reduction in the sloshing forces consequently the noise associated perforated baffles. Secondly, a proposed FEA of fuel tank wall subjected to impact and shear forces. 61% reduction was reported in vertical axis forces using the configuration. The difference obtained in the maximum noise associated was 25.6 decibels. The FEA showed a total deformation of 0.02488mm on the peak force for 2mm aluminum wall.Further studies could be carried out including the elastic behavior and aero/fluid acoustics.
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