CAJ | 학술논문

针对绞吸式开采方法水力输送系统中的双流道提升泵内部规律尚不明确,在水力输送固液两相流中容易出现使用效果不理想、易磨损的问题,应用Fluent软件,采用Mixture模型、RNG两方程湍流模型和SIMPLEC算法对提升泵在不同颗粒密度和体积分数下内部的流场进行了数值计算和对比分析,计算结果显示：随着颗粒密度和颗粒体积分数的不断增大,涡壳内的颗粒向外周壁积聚,而叶轮内颗粒由叶轮背面向叶轮工作面转移,固液两相离析加剧,泵的水力效率降低,扬程减小;同时,颗粒体积分数对泵效率的影响存在一个极大值点,体积分数低于15%时随体积分数增大而增大,增幅缓慢;当体积分数高于15%时,泵的效率随颗粒体积分数增大而降低.
침대교흡식개채방법수력수송계통중적쌍류도제승빙내부규률상불명학,재수력수송고액량상류중용역출현사용효과불이상、역마손적문제,응용Fluent연건,채용Mixture모형、RNG량방정단류모형화SIMPLEC산법대제승빙재불동과립밀도화체적분수하내부적류장진행료수치계산화대비분석,계산결과현시：수착과립밀도화과립체적분수적불단증대,와각내적과립향외주벽적취,이협륜내과립유협륜배면향협륜공작면전이,고액량상리석가극,빙적수력효솔강저,양정감소;동시,과립체적분수대빙효솔적영향존재일개겁대치점,체적분수저우15%시수체적분수증대이증대,증폭완만;당체적분수고우15%시,빙적효솔수과립체적분수증대이강저.
The paper focus on the problem that the flow field inside of the double current lift pump and the hydraulic power property have not been grasped completely,and the effectiveness is not ideal and easy to wear.Using the software of Fluent,based on the Mixture model,RNG turbulence model and SIMPLEC algorithm,the paper calculated and analyzed the field of solid-liquid phases flow in double-channel pump with different partical density and concentration.The results show that when the partical density and volume concentration are increasing,the particle distribution in impeller is transferred from the back of impeller to the work face,and the particle in the volute is being accumulated from base circle to the peripheral wall,and solid-liquid phases is increasingly segregating,and the hydraulic efficiency of pump reduced and the lift decrease.The efficiency of double channel pump takes the volume concentration of solid phase at 15% as the maximum point.When below 15%,the pump efficiency increases with the increase of volume concentration,but when more than 15%,the efficiency decreases greatly with the increase of volume concentration.