An Integrated Fluid Structure and Heat Transfer AnalysisMethodology for Brush Seals
94-1 0409 6576
An Integrated Fluid Structure and Heat Transfer Analysis
Methodology for Brush Seals
The objective of the proposed research is to develop a
comprehensive numerical model for brush seal design and
performance predictions. A 3-D, pressure-based, unstructured grid
Navier-Stokes fluid flow solver will be adapted, and interfaced
with a structures module for coupled fluid-structure solutions.
The code will account for 3-D flow distributions, bristle tips
heat generation and heat conduction and convection in the seal.
The structures module will predict tip loads and bristle
deformations, and will have physical models for interbristle
friction for predictions of seal hysteresis and dynamics. Tip
wear rate predictions will be based on tribological pairing, tip
loads and temperatures. The completed code will provide
predictions for key seal parameters: leakage and seal wear rates,
seal dynamics and leakage rate vs. time histograms.
Phase I work will focus on the adaptation of the fluid and heat
transfer solver and the grid generator. The adapted model will be
demonstrated by simulating flow and heat transfer in 3-D linear
bristle packs with non-moving bristles. In the Phase II part of
the work, the interface to the structural module for deformation
analysis will be completed, and the physical models for wear
rates, interbristle friction and seal dynamics will be added.
The numerical model will be a state-of-the-art design and
analysis tool for dynamics, wear and life predictions for brush
seal systems. It will be very useful to brush seal manufacturers
and seal users. The flow solver with the fluid-structure
interaction capability will also prove useful in other areas such
as flows in and around turbine blading, disks, and other
secondary flow systems.
CFD Research Corporation
3325 Triana Blvd.
Huntsville, AL 35805