A Study of the Effects of Tip Clearance in a Supersonic Turbine-Reference-Cited by-同舟云学术

A Study of the Effects of Tip Clearance in a Supersonic Turbine

Published:2000-02-01 Issue:4 Volume:122 Page:674-683
ISSN:0889-504X
Container-title:Journal of Turbomachinery
language:en
Short-container-title:

Author:

Dorney Daniel J.¹,Griffin Lisa W.²,Huber Frank W.³

Affiliation:

1. Department of Mechanical Engineering, Virginia Commonwealth University, Richmond, VA 23284-3015

2. Fluids Dynamics Analysis Branch, NASA Marshall Space Flight Center, Marshall Space Flight Center, AL 35812

3. Riverbend Design Services, Palm Beach Gardens, FL 33418

Abstract

Flow unsteadiness is a major factor in turbine performance and durability. This is especially true if the turbine is a high work design, compact, transonic, supersonic, counterrotating, or uses a dense drive gas. The vast majority of modern rocket turbine designs fall into these categories. In this study a parallelized unsteady three-dimensional Navier–Stokes analysis has been used to study the effects of tip clearance on the transient and time-averaged flow fields in a supersonic turbine. The predicted results indicate improved performance in the simulation including tip clearance. The main sources of the performance gains were: (1) a weakened shock system in the case with tip clearance, and (2) the fact that the reductions in the shock losses were greater than the losses introduced by tip clearance. [S0889-504X(00)02404-1]

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/turbomachinery/article-pdf/122/4/674/5842091/674_1.pdf

Reference14 articles.

1. Griffin, L. W., and Rowey, R. J., 1993, “Analytical Investigation of the Unsteady Aerodynamic Environments in Space Shuttle Main Engine (SSME) Turbines,” ASME Paper No. 93-GT-363.

2. Griffin, L. W., and Huber, F. W., 1993, “Advancement of Turbine Aerodynamic Design Techniques,” ASME Paper No. 93-GT-370.

3. Griffin, L. W., Huber, F. W., and Sharma, O. P., 1996, “Performance Improvement Through Indexing of Turbine Airfoils: Part 2—Numerical Simulation,” ASME J. Biomech. Eng., 118, No. 4, pp. 636–642.

4. Griffin, L. W., and Nesman, T., 1996, “Prediction of the Unsteady Aerodymanic Environment in the RRTT Turbine,” presented at the 14th Workshop for Fluid Dynamic Applications in Rocket Propulsion and Launch Vehicle Technology, NASA/Marshall Space Flight Center, Apr. 23–25.

5. Garcia, R., Griffin, L. W., Benjamin, T. G., Cornelison, J. W., Ruf, J. H., and Williams, R. W., 1995, “Computational Fluid Dynamics Analysis in Support of the Simplex Turbopump Design,” NASA CP-3282, 1, pp. 462–470.

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