摘要
运用量纲方法分析了圆弧形鼻坎挑射流空中消能率的影响因素,采用两个系列共5种圆弧形挑流鼻坎模型,研究空中消能率与鼻坎体型参数和射流起挑断面弗劳德数的关系。试验结果表明起挑断面弗劳德数和鼻坎挑角对空中消能率的影响较大,相对反弧半径对空中消能率的影响可以忽略。据试验数据拟合的空中消能率的计算公式是鼻坎挑角和起挑弗劳德数的函数,拟合公式计算值与试验值的误差小于8%。
On the analysis of gas temperature distribution of coal seam gas,assumption and conjecture ofαvalue in the overall equation of gas content were proposed.In the condition of constant pressure and increasing pressure,the experiment obtained the coal and gas adsorption and seepage law at different temperatures.WY98 Agas adsorption/desorption instrument was used in the experiment.By setting different temperatures,the experiment studiedαvalue in function relationship between the coal sample saturated adsorption and the temperature,and conducted mathematical fitting for the saturated adsorption,and finally obtained the function relationship,which could provide a scientific basis for the calculation of the gas content in coal seam and quantity of drainage at different stages.
出处
《太原理工大学学报》
CAS
北大核心
2015年第3期308-311,共4页
Journal of Taiyuan University of Technology
基金
中央高校基本科研究业务费项目(2014B03114)
关键词
空中消能率
圆弧形挑流鼻坎
物理模型试验
energy dissipation rate through air
circular shaped flip bucket
physical model test
