| 热敏感流体空化数值模拟及流动特性分析 |
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| 引用本文： | 杨其文,张炜,李晓俊,陈峰,朱祖超.热敏感流体空化数值模拟及流动特性分析[J].排灌机械工程学报,2021,39(7):699-705. |
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| 作者姓名： | 杨其文 张炜 李晓俊 陈峰 朱祖超 |
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| 作者单位： | 1. 中石化洛阳工程有限公司, 河南 洛阳 471003; 2. 浙江理工大学浙江省流体传输技术研究重点实验室, 浙江 杭州 310018;3.浙江机电职业技术学院机械技术系, 浙江 杭州 310053 |
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| 摘 要： | 为描述和捕捉热敏感流体空化的流动特性,文中对Zwart-Gerber-Belamri(ZGB)空化模型进行了热力学修正.通过将ZGB模型与修正的ZGB空化模型对液氮绕二维水翼空化流动的模拟结果与Hord的试验数据进行对比. 结果表明:修正的ZGB空化模型对于热敏空化流动的模拟结果与试验数据更加吻合,特别是能够较好的预测水翼表面温度和压力的分布. 采用修正的ZGB空化模型对氟化酮绕NACA 0015三维水翼的空化流动进行研究,并将空腔脱落的演化过程与Kelly的试验数据进行对比,模拟结果可以合理预测到试验过程中三维水翼附近空腔的脱落及其演化过程,进一步证明了修正的ZGB空化模型对于不同热敏流体的适用性.最后,对热敏流体空化周期性脱落的动态特征进行了识别和分析.结果表明:Ω的等值面与脱落的空腔形状相似,这表明脱落的空腔区域中呈现大规模的旋涡运动.空腔的生长脱落使水翼壁面产生明显的温降,B因子能够有效的预测腔内温降.
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| 关 键 词： | 空化流动 空化模型 热力学效应 旋涡结构 |
| 收稿时间： | 2020-05-15 |
Numerical simulation of cavitation and Analisis of flow characteristic of thermo-sensitive fluid |
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| YANG Qiwen,ZHANG Wei,LI Xiaojun,CHEN Feng,ZHU Zuchao.Numerical simulation of cavitation and Analisis of flow characteristic of thermo-sensitive fluid[J].Journal of Drainage and Irrigation Machinery Engineering,2021,39(7):699-705. |
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| Authors: | YANG Qiwen ZHANG Wei LI Xiaojun CHEN Feng ZHU Zuchao |
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| Institution: | 1. Luoyang Petrochemical Engineering Corporation, SINOPEC, Luoyang, Henan 471003, China; 2.Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310013, China; 3. Mechanical Engineering Department, Zhejiang Institute of Mechanical & Electronical Engineering, Hangzhou, Zhejiang 310053, China |
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| Abstract: | In order to describe and capture the cavitation flow patterns in thermal-sensitive fluid. Consi-deration the thermodynamic effects, the cavitation model based on the Zwart-Gerber-Belamri(ZGB)model was coupled with the heat transfer and vapour-liquid two-phase state equations was modified to describe and capture the cavitation characteristics of thermal-sensitive fluid. The model was va-lidated by the cavitation flow around a 2D hydrofoil, and the results agreed well with the experimental data of Hord in NASA. The results show that the simulation results by the modified ZGB cavitation model for thermal cavitation flow simulation results are more consistent with the experimental results, especially on the prediction of the temperature and pressure distribution on the hydrofoil surface. Subsequently, the modified ZGB cavitation model was used to investigate the cavitation characteristics of fluoroketone around NACA 0015 hydrofoil, and the evolution process of cavitation flow shedding was compared with Kelly′s experimental data. During the process, the shedding of the cavity near the three-dimensional hydrofoil and its evolution process can reasonably predict. The applicability of the modified ZGB cavitation model for different thermo-sensitive fluids was further proved. Finally, the dynamic cha-racteristics of thermal fluid periodic cavitation shedding were identified and analyzed. The results show that the isosurface of Ω is similar to the shape of the cavity shedding, which indicates that the cavity shedding region shows large-scale vortex motion. The growth and shedding of the cavity cause a significant temperature drop on the hydrofoil wall surface, and the B-factor can effectively predict the temperature drop in the cavity. |
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| Keywords: | cavitation flow cavitation model thermodynamic effect vortex structure |
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