郑州大学学报（工学版）2011，Vol.32Issue(3)：119-123,5.
水力喷砂射孔喷嘴的数值模拟及试验研究
Numerical and Experimental Study for Convergent Nozzles of Hydraulic Sand-Blasting Perforation
摘要
Abstract
Aiming at the key problem that length-diameter ratio of convergent nozzle seriously affected erosion capability of water jet, acceleration mechanism of water jet within the jet nozzles is studied and length-diameter ratio of nozzle is the main factor to affect the acceleration of water jet. According to the structure of 5-inch casing the most commonly used nozzles in engineering, selecting the line segment length of 6 -12 mm, a diameter of 4 ~ 6 mm. Numerical calculations were conducted for 35 group-type of convergent ejector nozzles by the FLUENT software. The results show that there is an optimum length-diameter ratio value for nozzles. Align to these calculations, when length-diameter ratio reaches 1.8, jet velocity is maximum. Different types of nozzles are machined following the numerical calculation model in the laboratory. Non-contact tests are done by the PIV. Testing results are consistent with numerical simulation results. It reveals the reasons that impact the jet acceleration performance under the different length-diameter ratios.关键词
射孔/喷嘴/长径比/数值模拟/PIVKey words
perforation/nozzle/length-diameter ratio/numerical simulation/PIV分类
能源科技引用本文复制引用
葛兆龙,卢义玉,左伟芹,夏彬伟,赵艳萍,汤积仁..水力喷砂射孔喷嘴的数值模拟及试验研究[J].郑州大学学报（工学版）,2011,32(3):119-123,5.基金项目
国家自然科学基金委创新群体基金(50621403) （50621403）
重庆市杰出青年基金(CSTC，2009BA6047) （CSTC，2009BA6047）
重庆大学研究生科技创新基金项目(201005B1B0010342) （201005B1B0010342）
