新型喷雾轴流风机的试验和数值研究  

Experimental and Numerical Studies on New Spray Axial-Flow Fans

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作  者:李景银[1] 韩强[1] 赵燕杰[1] 牛子宁[1] 

机构地区:[1]西安交通大学能源与动力工程学院流体机械研究所,陕西西安710049

出  处:《工程热物理学报》2013年第2期266-269,共4页Journal of Engineering Thermophysics

基  金:国家自然科学基金资助项目(No.50776066)

摘  要:本文设计了两种具有新型喷雾装置的喷雾轴流风机,并按照国家标准GB1236-2000进行了喷雾风机性能试验。试验结果表明,与现有喷雾风机试验数据进行对比,两种方案中进气口处设置环形喷水管喷水的喷雾风机喷雾效果好;随着水气比的增加,风机全压效率下降率低,电机功耗增加率低,水利用率高。对该喷雾风机模型的空气相工况以及气液两相流进行数值计算,结果表明:空气相工况的数值计算结果和试验结果基本吻合;离散相模型数值计算结果与试验结果相差较大,不能有效地模拟和分析喷雾风机内的复杂流场,需开发新的计算模型。Two different spray-generating devices have been used in the spray axial-flow fan in this paper. The performance curves of the spray axial-flow fans were tested according to the national performance test standard. The experimental results showed that the characteristics of the fan with the new spray-generating device have been improved obviously, compared with those of the spray fan with the conventional spray-generating device. The new fan obviously expands the limit of the existing spray fan on the amount of added water. With the increase in the amount of sprayed water, its increase rates in total efficiency and power consumption become lower while its utilization efficiency of sprayed water becomes higher. Numerical investigations on this new fan under the air phase or the mixed air-water phase were also conducted. The results indicated that the numerical results agree well with the experimental data with the pure air phase. On the contrary, the numerical results for the mixed air-water phase using the discrete phase model in the Fluent program show an evident deviation from the experimental results. The numerical simulations underestimate the deteriorating effect of the spray fan with water added. Purther research is needed to explore the new computational model.

关 键 词:喷雾轴流风机 试验测试 数值模拟 离散相模型 

分 类 号:TH432.1[机械工程—机械制造及自动化]

 

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