|
|||||
|
|
Characteristics of impact-driven high-speed liquid jets in water |
|
| Authors: | A Matthujak C Kasamnimitporn W Sittiwong K Pianthong K Takayama B E Milton |
| Institution: | 1. Combustion and Jet Application Research Laboratory (CJARL), Department of Mechanical Engineering, Faculty of Engineering, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand 2. Department of Mechanical Engineering, Faculty of Engineering, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand 3. Shock Wave Interdisciplinary Application Division, Institute of Fluid Science, Tohoku University, 2-1-1, Katahira, Sendai, 980-8577, Japan 4. School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, Australia |
| Abstract: | This paper describes a preliminary investigation of the characteristics of high-speed water jets injected into water from an orifice. The high-speed jets were generated by the impact of a projectile launched by a horizontal single-stage powder gun and submerged in a water test chamber. The ensuing impact-driven high-speed water jets in the water were visualized by the shadowgraph technique, and the images were recorded by a high-speed digital video camera. The processes following such jet injection into water, the jet-induced shock waves, shock wave propagation, the bubble behavior, bubble collapse-induced rebound shock waves and bubble cloud re-generation were observed. Peak over-pressures of about 24 and 35 GPa measured by a Polyvinylidence difluoride (PVDF) piezoelectric film pressure sensor were generated by the jet impingement and the bubble impingement, respectively. The peak over-pressure was found to decrease exponentially as the stand-off distance between the PVDF pressure sensor and the nozzle exit increases. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |