上海交通大学学报

上海交通大学学报（自然版） ›› 2017, Vol. 51 ›› Issue (11): 1399-1404.doi: 10.16183/j.cnki.jsjtu.2017.11.017

• 兵器工业 • 上一篇    下一篇

沙粒粒径与含量对喷嘴空化的影响

赵伟国1,2，韩向东1,2，盛建萍3，潘绪伟1,2   

  1. 1. 兰州理工大学 能源与动力工程学院， 兰州 730050； 2. 兰州理工大学 甘肃省流体机械及系统重点实验室， 兰州 730050； 3. 合肥凯泉电机电泵有限公司， 合肥 230000
  • 出版日期:2017-11-30 发布日期:2017-11-30
  • 基金资助:
    国家自然科学基金项目(51269011),甘肃省高等学校基本科研业务费

Research on the Effects of Silt Mean Diameters and Silt Concentrations on the Cavitation Flow in a Nozzle

ZHAO Weiguo1, 2,HAN Xiangdong1, 2,SHENG Jianping3,PAN Xuwei1, 2   

  1. 1. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. Key Laboratory of Fluid Machinery and System of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China; 3. Hefei Kaiquan Motor & Pump Co., Ltd., Hefei 230000, China
  • Online:2017-11-30 Published:2017-11-30

摘要： 为了研究沙粒粒径与含量对空化的影响，通过模拟清水介质下的空化流动，并与实验结果对比，验证算法的可靠性.通过计算含沙水流条件下的空化流动，揭示粒径与含量对空化影响的规律.研究结果表明：沙粒促进空化发展时，体积分数为0.9的空泡较清水介质下的大；沙粒抑制空化发展时，空泡较清水介质下的小.随粒径增加，促进空化发展的含沙量范围逐渐减小，抑制空化发展的含沙量范围逐渐增大，表明粒径与含量共同影响空化的发展.沙粒对空化发展的影响与空化核子、滑移速度、黏滞性和粗糙度等因素有关.

关键词: 喷嘴, 空化, 沙粒粒径, 含沙量, 数值模拟

Abstract: The aim of this research is to study effects of silt mean diameters and silt concentrations on the evolution of cavitation. Cavitation occurring in the pure water was simulated and results were compared with experimental results to verify the algorithm employed. Silt-laden cavitation flows were simulated and laws were revealed. Results indicated that cavitation bubble with volume fraction being 0.9 is larger than pure water, when silt particles promote the evolution of cavitation. When silt particles suppress the evolution of cavitation, the cavitation bubble is smaller than pure water. With silt mean diameters being larger, scope of silt concentration promoting the evolution of cavitation shrank gradually and scope of silt concentration inhibiting the evolution of cavitation increased gradually. Results showed that silt concentrations and silt mean diameters jointly play important roles in the effects on the evolution of cavitation. Cavitation nuclei, slip velocity, viscosity and roughness have a close relation with the effects of silt particles on the evolution of cavitation.

Key words: nozzle, cavitation, silt mean diameter, silt concentration, numerical simulation

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