實驗名稱：微通道內沸騰相變(bian)傳熱實驗

　　實驗內容：探究(jiu)電(dian)(dian)潤濕效(xiao)應在(zai)微通道內沸(fei)騰相變傳熱中影(ying)響作(zuo)用。在(zai)不同電(dian)(dian)潤濕參(can)數下，探究(jiu)電(dian)(dian)潤濕效(xiao)應對(dui)氣(qi)(qi)(qi)液界(jie)面行(xing)為影(ying)響分析，可視化(hua)觀察微通道內氣(qi)(qi)(qi)泡尺寸(cun)、氣(qi)(qi)(qi)液界(jie)面行(xing)為，明(ming)確交流電(dian)(dian)潤濕效(xiao)應對(dui)氣(qi)(qi)(qi)泡尺寸(cun)、氣(qi)(qi)(qi)液界(jie)面行(xing)為的影(ying)響及壁面溫度變化(hua)情況。

　　研究方向：微通道沸騰相變傳熱

　　測試設備：信號發生器、ATA-2081高(gao)壓放大器、高(gao)速攝影儀、數據采集儀等(deng)。

　　圖(tu)1：實驗(yan)裝置圖(tu)

　　實驗過程：以去離子(zi)(zi)水為工(gong)質(zhi)介(jie)(jie)質(zhi)，通(tong)(tong)過(guo)注射(she)泵推動(dong)去離子(zi)(zi)水進(jin)入測試(shi)(shi)微通(tong)(tong)道(dao)。流(liu)體(ti)在測試(shi)(shi)段中(zhong)吸收由(you)直流(liu)電(dian)源提供(gong)的壁面加熱(re)熱(re)量(liang)后由(you)單相液體(ti)到沸(fei)騰相變流(liu)體(ti)，并經微通(tong)(tong)道(dao)出(chu)口流(liu)入流(liu)體(ti)收集器。介(jie)(jie)電(dian)驅動(dong)電(dian)壓(ya)由(you)信號發生器提供(gong)并經功率(lv)(lv)放大器（Aigtek，ATA-2081）輸出(chu)（電(dian)壓(ya)：0-360v,頻(pin)率(lv)(lv)，0-2kHz）。通(tong)(tong)過(guo)PLC對驅動(dong)電(dian)極陣列順(shun)序(xu)供(gong)電(dian)，可控制(zhi)微通(tong)(tong)道(dao)內氣-液界面振蕩。

　　實驗結果：

　　圖2：實驗結果

　　通(tong)過PLC繼電(dian)(dian)(dian)(dian)(dian)器(qi)設計(ji)每(mei)5s施加介(jie)(jie)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓(ya)，然(ran)后斷開5s，并以此規律周(zhou)(zhou)期作(zuo)用(yong)。當施加介(jie)(jie)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓(ya)50V后，在(zai)第一個周(zhou)(zhou)期，壁(bi)(bi)面(mian)(mian)(mian)(mian)溫度(du)迅速(su)(su)從(cong)疏水(shui)壁(bi)(bi)面(mian)(mian)(mian)(mian)的(de)(de)102.8℃降(jiang)低到(dao)親水(shui)壁(bi)(bi)面(mian)(mian)(mian)(mian)的(de)(de)102.4℃；當關閉介(jie)(jie)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓(ya)，壁(bi)(bi)面(mian)(mian)(mian)(mian)溫度(du)又(you)迅速(su)(su)上升(sheng)到(dao)102.8℃。在(zai)后面(mian)(mian)(mian)(mian)幾(ji)個周(zhou)(zhou)期，均觀(guan)察到(dao)在(zai)介(jie)(jie)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓(ya)作(zuo)用(yong)下壁(bi)(bi)面(mian)(mian)(mian)(mian)溫度(du)迅速(su)(su)下降(jiang)，關閉電(dian)(dian)(dian)(dian)(dian)壓(ya)，壁(bi)(bi)面(mian)(mian)(mian)(mian)又(you)迅速(su)(su)上升(sheng)。當介(jie)(jie)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)壓(ya)為60v時，也觀(guan)察到(dao)類似現象。實驗結果(guo)表明，在(zai)微通(tong)道內(nei)流(liu)動(dong)沸騰條件下，通(tong)過交流(liu)電(dian)(dian)(dian)(dian)(dian)壓(ya)電(dian)(dian)(dian)(dian)(dian)潤濕效應對(dui)(dui)壁(bi)(bi)面(mian)(mian)(mian)(mian)溫度(du)有冷(leng)卻的(de)(de)作(zuo)用(yong)，且溫度(du)響應變化非常迅速(su)(su)。電(dian)(dian)(dian)(dian)(dian)潤濕作(zuo)用(yong)使(shi)汽(qi)液界面(mian)(mian)(mian)(mian)在(zai)毫(hao)秒級時間內(nei)發生明顯(xian)周(zhou)(zhou)期性(xing)振蕩。汽(qi)液界面(mian)(mian)(mian)(mian)振蕩使(shi)汽(qi)泡干涸區域(yu)被(bei)周(zhou)(zhou)期性(xing)潤濕，從(cong)而降(jiang)低了(le)壁(bi)(bi)面(mian)(mian)(mian)(mian)溫度(du)。發現由功率放(fang)大(da)(da)器(qi)施加的(de)(de)驅動(dong)電(dian)(dian)(dian)(dian)(dian)壓(ya)越大(da)(da)，壁(bi)(bi)面(mian)(mian)(mian)(mian)溫度(du)的(de)(de)減(jian)少越明顯(xian)，但頻率對(dui)(dui)壁(bi)(bi)面(mian)(mian)(mian)(mian)溫度(du)的(de)(de)減(jian)少不(bu)明顯(xian)。

　　功率放大(da)器推薦(jian)：ATA-2081高壓放大(da)器

　　圖：ATA-2081高壓放大器指標參數

　　西安安泰電(dian)子是專業(ye)從事(shi)功率放大器(qi)、高(gao)壓放大器(qi)、功率信(xin)號源、前置微小信(xin)號放大器(qi)、高(gao)精(jing)度(du)電(dian)壓源、高(gao)精(jing)度(du)電(dian)流(liu)源等電(dian)子測量儀(yi)器(qi)研發、生產(chan)(chan)和銷售(shou)的高(gao)科技企業(ye)，為用戶提供具(ju)有(you)(you)競爭力的測試方案。Aigtek已(yi)經成為在業(ye)界擁有(you)(you)廣泛(fan)產(chan)(chan)品線，且具(ju)有(you)(you)相(xiang)當規模的儀(yi)器(qi)設備供應(ying)商，樣機都支持免費(fei)試用。如想了解更多功率放大器(qi)等產(chan)(chan)品，請持續關注安泰電(dian)子官網hkdyw.cn或撥打029-88865020。