扰流孔强化波纹板蓄热元件传热性能的实验研究

Experimental Study on Heat Transfer Enhancement of Corrugated Plate by Staggered Perforations

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/Nu_o*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/Nu_o*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.

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/Nu. ＊ 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/Nu.＊ 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°.