マイクロ管内水中衝撃波圧力とマイクロジェット速度の同時計測

市原 さやか; 山元 翔太; 嶋﨑 隆晃; Franco-Gómez Andrés; Yee Jingzu; 田川 義之

doi:10.11345/japannctam.66.0_107

The 66th Japan National Congress for Theoretical and Applied Mechanics

Session ID : OS5-1-04

DOI https://doi.org/10.11345/japannctam.66.0_107

Conference information

Host: The Japan Federation of Engineering Societies

Co-host: AIJ, JASCOME, MSJ, JASNAOE, JSFM, JSCES, SCE, JSMF, JSAE, HTSJ, JGS, JSME, JPS, JSIDRE, JAWE, JAEE, JSIAM

Sponsor: National Committee for IUTAM

Name : The 66th Japan National Congress for Theoretical and Applied Mechanics

Location : [in Japanese]

Date : June 24, 2022 - June 26, 2022

OS5-1

Simultaneous measurement of the pressure of an underwater shockwave in a microtube and velocity of a microjet

*Sayaka Ichihara, Shota Yamamoto, Takaaki Shimazaki, Andrés Franco-Gómez, Jingzu Yee, Yoshiyuki Tagawa

Author information

Keywords: Background-oriented schlieren technique, Underwater shockwave, Microjet, Non-contact pressure field measurement

CONFERENCE PROCEEDINGS FREE ACCESS

Details

Abstract

We simultaneously measure the velocity of a liquid microjet ejected from a microtube and the pressure impulse of the underwater shock front in the microtube using high-resolution background-oriented schlieren (BOS) technique, which utilizes a high-resolution camera and a microdot background pattern. Remarkably, the linear relation between the velocity of the microjet and the pressure impulse of the shock front is observed for the first time. Such relation was theorectically/numerically predicted by Peters et al. JFM (2013). In addition, we experimentally confirmed that the linear relation does not hold for the cases with secondary cavitation in the liquid bulk.

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