东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2007, Vol. 28 ›› Issue (10): 1417-1420.DOI: -

• 论著 • 上一篇    下一篇

壅塞现象法测量气粉两相流音速

李强;冯明霞;邹宗树;沈峰满;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2007-10-15 发布日期:2013-06-26
  • 通讯作者: Li, Q.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50474014)

Choking phenomenon used as an approach to measure sonic velocity of air-powder two-phase flow

Li, Qiang (1); Feng, Ming-Xia (1); Zou, Zong-Shu (1); Shen, Feng-Man (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2007-10-15 Published:2013-06-26
  • Contact: Li, Q.
  • About author:-
  • Supported by:
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摘要： 实验研究了在水平等截面管道中空气-树脂粉两相流的音速.基于壅塞现象原理,提出了一种测量气粉两相流音速的新方法.得到了空气-树脂粉两相流在不同固气比下质量流量和滞止压强的关系,从而确定了发生壅塞现象的临界压强,进一步得到了临界压强比和固气比的关系式.考虑两相流连续方程确定出两相流的实际表观音速,并且与两相平衡流理论计算所得的理论音速进行了比较,仅为其0.5~0.7倍.

关键词: 气粉两相流, 音速, 壅塞现象, 测量

Abstract: Experiments were carried out to investigate the sonic velocity of air-powder two-phase flow in a horizontal constant cross section duct. Based on the forming principle of choking phenomenon, an approach is proposed to measure the sonic velocity of air-powder two-phase flow. The relationship between the mass flow rates of such an air-powder two-phase flow and inlet stagnant pressure is obtained with different solid-to-air ratios, thus determining the pressure under which the choking phenomenon takes place and, further, giving the relationship of the ratio of back pressure to critical pressure and the solid-to-air ratio. Taking the continuity equation of air-powder flow into consideration, the apparent sonic velocity of two-phase flow can be given. Furthermore, the apparent sonic velocity is compared with theoretical sonic velocity calculated on the theory of two-phase equilibrium flow.

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