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research-article

UNSTEADY PRESSURE MEASUREMENT ON OSCILLATING BLADE IN TRANSONIC FLOW USING FAST-RESPONSE PRESSURE-SENSITIVE PAINT

[+] Author and Article Information
Toshinori Watanabe

Department of Aeronautics and Astronautics, The University of Tokyo, Tokyo, Japan
watanabe@aero.t.u-tokyo.ac.jp

Toshihiko Azuma

School of Engineering, The University of Tokyo, Tokyo, Japan
toshihiko2_azuma@mhi.co.jp

Seiji Uzawa

The University of Tokyo, Tokyo, Japan
uzawa@aero.t.u-tokyo.ac.jp

Takehiro Himeno

The University of Tokyo, Tokyo, Japan
himeno@aero.t.u-tokyo.ac.jp

Chihiro Inoue

The University of Tokyo, Tokyo, Japan
inoue@rocketlab.t.u-tokyo.ac.jp

1Corresponding author.

ASME doi:10.1115/1.4039180 History: Received October 23, 2017; Revised November 13, 2017

Abstract

A fast-response pressure-sensitive paint (PSP) technique was applied to the measurement of unsteady surface pressure of an oscillating cascade blade in a transonic flow. A linear cascade was used, and its central blade was oscillated in a translational manner. The unsteady pressure distributions of the oscillating blade and two stationary neighbors were measured using the fast-response PSP technique, and the unsteady aerodynamic force on the blade was obtained by integrating the data obtained on the pressures. The measurements made with the PSP technique were compared with those obtained by conventional methods for the purpose of validation. From the results, the PSP technique was revealed to be capable of measuring the unsteady surface pressure, which is used for flutter analysis in transonic conditions.

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