EFD Analysis of complex flow fields by measurement of pressure distribution based on lifetime imaging

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04171
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 19010:Fluid engineering-related
• Research Institution: Kyushu University
• Principal Investigator: MORI Hideo 九州大学, 工学研究院, 准教授 (70362275)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 感圧塗料 / 寿命法 / 感圧・感温複合塗料

Outline of Final Research Achievements

Simultaneous measurement method of pressure and temperature distribution has been developed by applying lifetime-based method to dual-layer PSP/TSP (DL-PTSP), composite method of pressure-sensitive paint (PSP) and temperature-sensitive paint (TSP). Appropriate and efficient conditions of shutter gates of the high-speed camera are proposed to accomplish high pressure and temperature sensitivity and increase the number of data sets for simultaneous measurement of pressure and temperature. In addition, the minimum thickness of the required intermediate layers, isolating the PSP layer from the TSP layer physically not to spoil the sensitivity and the luminescence intensity of PSP and TSP, are clarified. It enables to decrease the temperature difference between the PSP layer and the TSP layer and to increase the accuracy of pressure measurement.

Free Research Field

流体工学，流体計測

Academic Significance and Societal Importance of the Research Achievements

本研究の成果として実現した，重ね塗り感圧・感温塗料による圧力・温度同時イメージング計測手法は，複雑流動場を対象とした実験流体力学的解析に必要不可欠な計測技術であり，本計測技術を適用した高度な実験解析の実現により，民生用ターボ機械まわりなどに見られる複雑流動場において，剥離や渦構造が形成する不均一な圧力分布を可視化することが可能となる．その結果，特にゲージ圧の低い民生用ターボ機械において性能低下や騒音の発生源となり得る異常流動現象の解析を進め，性能向上に必要な知見を得ることが可能となる．