CAE Applications in Hydraulics - Experimental and Analytical Study of a Check-Valve 2003-01-1605

This paper demonstrates the critical role of analysis in a design process and the application of advanced Finite-Element based CFD tools with Fluid-Structure Interaction (FSI) capabilities. It shows how analysis solves problems dealing with NVH and complicated dynamics through a specific problem of check-valve design, development and optimization. It also shows how CFD in combination with parametric sensitivity approach, can help to understand the physics in a specific design of interest and then use the lessons learned to improve its performance. In addition to the non-intrusive nature of analysis, the analytical parametric sensitivity approach offers other advantages. It can be applied faster, easier, less expensively, and sometimes provide more accurate results than a hardware test.

In this effort, the analytical study was reinforced by a detailed experimental investigation. Both methods independently identified the critical performance parameters and helped us understand and explain the check-valve performance. The two efforts ultimately merged, guiding us toward a check-valve design that is quiet, efficient, leak-proof, and inexpensive.

The experimental portion of this effort has validated CFD findings and provided a complete performance assessment of the new check-valve design. However, such large-scope experimental study is not always possible. Consequently, an ability to validate analytical predictions, as was done here, is very important for future CAE applications, because of increased confidence level.

Selecting the proper tools and applying them correctly can be invaluable in a design process. Ultimately, CAE should be an integral part of a design process. In addition to design optimization, it should be used right from the start in a design concept evaluation. Hopefully, this paper will encourage more frequent use of CAE tools and will add to the knowledge base of check-valve design and performance.