Development of pressure-velocity gradient measurement probe and clarification of the turbulent mechanism of jet

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K17969
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Nagoya University
• Principal Investigator: Iwano Koji 名古屋大学, 工学研究科, 助教 (20750285)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 圧力・速度勾配相関 / 噴流 / 乱流 / レイノルズ応力

Outline of Final Research Achievements

In this study, we developed new probes that can simultaneously measure pressure and velocity gradient in order to directly investigate the process of Reynolds stress disappearance in turbulent flow, that is, the isotropization process of turbulence. The values of the pressure-velocity gradient correlation obtained from the Reynolds stress balance and that obtained from the direct measurement by the developed probes agree well inside the velocity half-width of the planer jet, and the measurement accuracy of the developed probes was confirmed. In addition, by using wavelet analysis, it became clear that there is interaction between scales in the isotropization process of turbulence.

Free Research Field

流体工学