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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN Print: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v17.i1.60
pages 85-98

PIV OBSERVATION OF PREWHIRL FLOW UPSTREAM OF A TURBOPUMP INDUCER

Mitsuru Shimagaki
Engine System Group, Space Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA), JAPAN
Tomoyuki Hashimoto
Engine System Group, Space Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA), JAPAN
Mitsuo Watanabe
Engine System Group, Space Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA), JAPAN
Satoshi Hasegawa
Engine System Group, Space Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA), JAPAN
Yoshiki Yoshida
Engine System Group, Space Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA), JAPAN
Toshiya Kimra
Advanced Propulsion Technology Research Group, Space Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA), JAPAN
Katsuji Nagaura
Foundation for Promotion of Japan Aerospace Technology, JAPAN

ABSTRACT

Complex flow caused by prewhirl flow, backflow, tip leakage flow, and main flow was determined in the inlet of a turbopump inducer by means of PIV. The prewhirl flow component swirled in the same direction as the inducer rotation along a casing from the inducer inlet to a region further upstream. A strong Reynolds shear stress occurred upstream of the inducer. This area became unsteady due to shear flow caused by the interaction of the prewhirl flow and the main flow. The region which developed a strong mean vorticity was steady due to being not influenced either by both the Reynolds shear stress or by the fluctuation vorticity near the blade tip.


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