1. 제 목 : Time Accurate Simulation of Stall Inception & Control in a Turbine Engine

2. 연 사 : Dr. Michael Hathaway
(Vehicle Technology Directorate Army Research Laboratory Cleveland, OH)

3. 일 시 : 2008년 4월 16일(수) 14:30~15:30

4. 장 소 : 301동 117호 세미나실

5. 내 용 :
The performance of gas turbine engines is limited by compressor stall,
and further exacerbated by combat conditions. Stall control technologies
developed at the Army Research Laboratory (ARL) Vehicle Technology
Directorate (VTD) and NASA Glenn Research Center (GRC) have
demonstrated the effectiveness of steady tip injection to increase the
stable operating range of high-speed axial and centrifugal compressors.
A major element lacking in the development of the stall control technology
is a fundamental understanding of the fluid mechanic processes of stall
inception, and how stall is mitigated by the stall control technology to
achieve increased compressor stall range. Such understanding is essential
for providing improved design guidance in implementing stall control
technology in engines. As such, in parallel with engine demonstrator tests
we are generating time-accurate, full-annulus, three-dimensional Navier-
Stokes code simulations of single-stage axial and centrifugal compressors
for which experimental compressor performance data are available, both
with and without stall control technology. The results of TURBO simulations,
which show predicted range extension with stall control technology
compared to measurements, and characteristics of the compressor flow
field with and without stall control technology are presented.
The simulations of an axial compressor are also used to investigate the
physics of stall inception.

6. 문 의 : 기계항공공학부 송성진 교수(☏ 880-1667)