农用烟囱风机结构性能优化

冷东洋; 施正香; 王宗伦; 马慧; 丁涛

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农用烟囱风机结构性能优化
冷东洋^1,3,施正香^1,2,王宗伦^1,3,马慧⁴,丁涛^1*
1.中国农业大学水利与土木工程学院, 北京 100083;2.农业农村部设施农业工程重点实验室, 北京 100083;3.北京市供水管网与安全节能中心, 北京 100083;4.北京首农畜牧发展有限公司, 北京 100083

摘要:

针对农用烟囱风机流量小，能效比偏低的问题，采用数值模拟的方法，在节约投资成本的前提下，不改变烟囱风机的叶片造型，对其配套的风筒结构尺寸进行改型优化。利用试验测试原型风机的性能后，通过数值模拟方法，从烟囱风机的风筒内径d(用改型后风筒内径与原型风筒内径之比，即内径比k表示)、出口段扩散角度α和扩散深度l这3个方面进行单因素改型优化。在单因素优化基础上，采用正交优化方法综合以上3个因素，得到风筒正交优化设计参数。根据正交所得优化参数制备相应风筒样机，进行试验性能测试。结果表明:1)单因素优化模拟下，与原型风机相比，k=0.985时风量和能效比提高了4.7%和4.0%；α=28°时风量和能效比提高了4.7%和5.3%；l=250 mm时风量和能效比提高了1.8%和3.2%。2)多因素正交数值模拟下，与原型风机相比，k=0.988、α=28°、l=200 mm时风量和能效比提高了7.9%和8.1%；3)对优化风机进行测试，与原型风机相比，优化风机风量和能效比提高4.6%和4.5%。

关键词: 烟囱风机风筒型式数值模拟性能优化

DOI：10.11841/j.issn.1007-4333.2020.02.11

分类号:

基金项目:国家重点研发计划专项项目(2018YFF0213604)；国家奶牛产业技术体系项目(CARS-36)

Structural performance optimization of agricultural chimney fanLENG Dongyang^{1, 3}, SHI Zhengxiang^{1, 2}, WANG Zonglun^{1, 3}, MA Hui⁴, DING Tao^1*

LENG Dongyang^1,3,SHI Zhengxiang^1,2,WANG Zonglun^1,3,MA Hui⁴,DING Tao^1*

1.College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China;2.Key Laboratory of Agricultural Engineering in structure and Environment of Ministry of Agriculture and Rural Affairs, Beijing 100083, China;3.Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing 100083, China;4.Beijing First Agricultural Animal Husbandry Development Co., Ltd., Beijing 100083, China

Abstract:

Aiming at the problems that the flow of the agricultural chimney fan is small and the energy efficiency ratio is low, a numerical simulation method is adopted in this study. Under the premise of saving investment cost, the blade shape of the chimney fan is not changed and the size of the supporting air duct structure is modified and optimized. After testing the performance of the prototype fan, the numerical simulation method is used to calculate the inner diameter d of the air duct of the chimney fan(the inner diameter ratio k is used for the ratio of the inner diameter of the modified air duct to the inner diameter of the prototype air duct), the outlet section diffusion angle α and the diffusion depth l. On the basis of single factor optimization, the orthogonal optimization method is used to synthesize the above three factors to obtain the orthogonal optimal design parameters of the air duct. The corresponding air duct prototype is prepared according to the optimal parameters obtained by orthogonalization, and the laboratory performance test is performed. The results show that: 1)Under the single factor optimization simulation, compared with the prototype fan, the air volume and energy efficiency ratio increase respectively by 4. 7% and 4. 0% when k=0. 985, the air volume and energy efficiency ratio increase respectively by 4. 7% and 5. 3% when α=28°, and the air volume and energy efficiency ratio increase respectively by 1. 8% and 3. 2% when l=250 mm; 2)Under multi-factor orthogonal numerical simulation, the air volume and energy efficiency ratio increases by 7. 9% when k=0. 988, α=28°, l=200 mm compared with the prototype fan of 8. 1%; 3)The the optimized fan test results show that the fan airflow and the energy efficiency ratio increase respectively by 4. 6% and 4. 5% compared to the prototype fan.

Key words: chimney fan air duct type numerical simulation performance optimization

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