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文丘里管扩张段湿气流动特性与结构优化

徐英 王雅丹 张涛 汪晶晗

徐英, 王雅丹, 张涛, 汪晶晗. 文丘里管扩张段湿气流动特性与结构优化[J]. 机械科学与技术, 2018, 37(8): 1272-1279. doi: 10.13433/j.cnki.1003-8728.20180033
引用本文: 徐英, 王雅丹, 张涛, 汪晶晗. 文丘里管扩张段湿气流动特性与结构优化[J]. 机械科学与技术, 2018, 37(8): 1272-1279. doi: 10.13433/j.cnki.1003-8728.20180033
Xu Ying, Wang Yadan, Zhang Tao, Wang Jinghan. Wet-gas Flow Characteristics and Structural Optimization of Venturi Divergent Section[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(8): 1272-1279. doi: 10.13433/j.cnki.1003-8728.20180033
Citation: Xu Ying, Wang Yadan, Zhang Tao, Wang Jinghan. Wet-gas Flow Characteristics and Structural Optimization of Venturi Divergent Section[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(8): 1272-1279. doi: 10.13433/j.cnki.1003-8728.20180033

文丘里管扩张段湿气流动特性与结构优化

doi: 10.13433/j.cnki.1003-8728.20180033
详细信息
    作者简介:

    徐英(1970-),教授,博士,研究方向为湿气流量计量、智能仪表研发,xuying@tju.edu.cn

Wet-gas Flow Characteristics and Structural Optimization of Venturi Divergent Section

  • 摘要: 对文丘里管扩张段加速压降和摩阻压降进行理论分析,利用计算流体力学(Computational fluid dynamics,CFD)数值模拟方法针,对管径50 mm,节流比0.55的长喉颈文丘里,从扩张角度和扩张段形状入手设计了4种结构,寻找适合湿气流动且能提高文丘里前后差压比值K对液相体积含率LVF线性辨识能力的最优结构。模拟结果与理论分析吻合,表明差压比值K随扩张角度增加而增大,但难以实现线性辨识。扩张段采用椭圆弧结构,可通过减小加速压降增大摩阻压降提高K值对液相的分辨能力。同时必须保证扩张段与后直管段平缓连接,从而确保湿气流动形态稳定。椭圆弧结构与直线结构平缓相接的扩张段模型在保证湿气流动稳定前提下,将差压比K与LVF的线性度由原先的1.5%拓宽到4.5%。
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出版历程
  • 收稿日期:  2017-04-26
  • 刊出日期:  2018-08-05

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