采用瞬态实验方法研究了3种排列角度(15°、30°和45°)下的扰流孔波纹板蓄热元件的传热性能,并比较了等效泵功下的Nu/Nuo*值.结果表明:与未添加扰流孔的波纹板蓄热元件相比,3种排列角度下的带扰流孔的波纹板蓄热元件的平均Nu分别提高了17.1%、24.8%和34.9%;3种情况下的平均阻力因数f分别提高了24.7%、33.1%和38.4%;与排列角度为30°和15°相比,45°时的Nu/Nuo*分别提高了53.3%和67.8%,表明扰流孔排列角度为45°时,波纹板蓄热元件具有最佳性能.
Abstract
Transient test method was used to study the heat transfer performance of corrugated plate with staggered perforations in different arrangements (15°, 30° and 45°), and to compare the value of Nu/Nuo* at equal pumping power. Results show that compared with corrugated plates without perforations, the average Nu of the plate with staggered perforations in above three arrangements is increased by 17.1%, 24.8% and 34.9% respectively, with an increase of friction factor f by 24.7%, 33.1% and 38.4% accordingly. Compared with the arrangements of 15° and 30°, the value of Nu/Nuo* in the case of 45° is correspondingly increased by 53.3% and 67.8%, indicating that the heat transfer performance of corrugated plate reaches the maximum in the arrangement of 45°.
关键词
扰流孔 /
波纹板蓄热元件 /
强化传热 /
传热性能 /
实验研究
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Key words
perforation /
corrugated plate heat transfer element /
heat transfer enhancement /
heat transfer performance /
experimental study
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脚注
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基金
金华市科学技术研究计划重点资助项目(20131031)
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