气—粉两相流中浓度测量元件的阻力特性模拟(范明秀; 田茂诚; 张冠敏)

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K@l0Gky0E b0气—粉两相流中浓度测量元件的阻力特性模拟水利论文r*hM8^]

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【作者】范明秀; 田茂诚; 张冠敏 【作者单位】山东大学能源与动力工程学院

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【论文摘要】 应用靶式流量计测量流量的原理,通过数值计算方法模拟了含粉气流流过靶式流量计中节流靶件时的流场,并计算节流件受力和煤粉浓度之间的关系.比较了圆片、圆锥、半球、球等七种形式的节流件在不同浓度下的受力情况,得出了球形靶件在两相流中具有的对煤粉浓度变化反应灵敏,对风速变化敏感度底的结论.在实验室中搭建了煤粉空气两相流试验台,对圆片靶和球形靶两种靶件的受力进行了测量,实验验证了用靶式流量计方法测量稀疏相煤粉空气两相流浓度的可行性.同时表明了球形靶比圆片靶对两相流粒子浓度的反应灵敏度高.水利论文2dZ'K0^n7l

(V$J%a `K&_9Y/J y0【英文论文摘要】 Author applied the principle of target flowmeter measuring flux.In the way of numerical calculation,a model has been used to imitate the flow field where Gas-particle two phase flow impact the piece of target in target flowmeter,and calculate the relation between pressure on the piece of target and concentration of coal powder.This calculation project includes seven kinds of target.Though comparing stress on seven kinds of target at different concentration of Gas-particle two phase flow in the piping,author put forward that the globose target flowmeter have two advantage in measuring concentration of Gas-particle two phase flow.Firstly,when the wind velocity changed,the variety of stress is least.Secondly, globose target is the most sensitive to variety of coal powder concentration.In the experiments,a testing piping system of coal powder and air two phase flows was built in laboratory.Experiments adopt disk target and spherical target two kinds of target.Both the test data of two kind...更多s of target expressed the feasibility that the method of target flowmeter be used for measuring the concentration of sparse Gas-particle two phase flows.Then this result verify globose target is more sensitive than disk target to variety of coal powder concentration.  还原水利论文L;{;T*r5R:G;{

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【论文关键词】 两相流; 数值模拟; 浓度测量
'A4T;S0WKoK9S0【英文论文关键词】 two phase flow; numerical calculation; measuring concentration

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TAG: 浓度 范明秀 田茂诚 张冠敏 测量元件
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