The measurement of the pressure inside the supercavitating bubble and the establishment of the dynamic buoyancy measurement system for submerged supercavitating bodies

• Main Authors: Yii-Shuo Yang, 楊倚碩
• Other Authors: Young-Zehr Kehr
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/86834511234386915309

碩士 === 國立臺灣海洋大學 === 系統工程暨造船學系 === 94 === For the purpose of the early achievement of supercavitating phenomena, the ventilation system is established to supply the air into the cavity in the rear of the cavitator and hence the static pressure inside the cavity has been changed. One of the objectives of this paper is to establish a pressure measurement system and the pressure inside can be directly measured, and further the effective cavitation number can be determined. Comparing the pressure variations under different ventilation quantities, it shows that the lower cavitation number, the larger ratio of the cavity length to diameter. The other objective is to establish a whole new three-component balance measurement system and the dynamic buoyancy of the supercavitating body installed with skids can be measured. The design and calibration procedures are also introduced and compared with the old mechanism in this paper. Besides, because of the thinner strut of the new mechanism, the interference with forming the supercavitating bubble certainly becomes less.