【摘要】：板-泡式換熱器是一種新型高效緊湊式換熱器,相比于傳統(tǒng)換熱器,其具有傳熱效率高、體積小、承壓能力強(qiáng)等諸多優(yōu)點(diǎn),能顯著提高熱能利用效率、降低能耗、延長(zhǎng)使用壽命。因此,板-泡式換熱器具有廣闊的工程應(yīng)用前景。以多孔泡沫金屬作為流體通道的板-泡式換熱器,通過(guò)泡沫金屬拓展傳熱面積,由于結(jié)構(gòu)的高度緊湊,使得換熱面壁溫的測(cè)量難以實(shí)現(xiàn),傳統(tǒng)的測(cè)試方法已不能滿足測(cè)試要求；而現(xiàn)有的數(shù)值模擬方法,由于缺少合適的流體力學(xué)計(jì)算模型,也不能準(zhǔn)確獲知其內(nèi)部真實(shí)流動(dòng)和傳熱情況。針對(duì)上述問(wèn)題,本文應(yīng)用試驗(yàn)測(cè)試及數(shù)值模擬的方法研究板-泡式換熱器的傳熱與阻力性能,主要研究工作如下：1)基于單吹瞬變法,搭建不需測(cè)量壁溫便可求得換熱面?zhèn)鳠嵯禂?shù)的試驗(yàn)測(cè)試平臺(tái),并編寫(xiě)數(shù)據(jù)采集及系統(tǒng)控制程序,通過(guò)分析系統(tǒng)響應(yīng)特性及測(cè)試結(jié)果誤差,驗(yàn)證測(cè)試系統(tǒng)的穩(wěn)定性及測(cè)量準(zhǔn)確性。2)設(shè)計(jì)不同結(jié)構(gòu)參數(shù)的板-泡式換熱器測(cè)試試樣,對(duì)其進(jìn)行試驗(yàn)測(cè)試,獲得各試樣傳熱與阻力性能曲線,擬合傳熱及阻力準(zhǔn)則關(guān)系式。3)基于FLUENT多孔介質(zhì)模型,從整體上建立板-泡式換熱器整體幾何模型,并模擬分析換熱器內(nèi)流體流動(dòng)及溫度分布情況,通過(guò)試驗(yàn)驗(yàn)證數(shù)值模擬的可行性和準(zhǔn)確性,基于該模型進(jìn)一步分析結(jié)構(gòu)參數(shù)對(duì)板-泡式換熱器傳熱及阻力性能的影響情況。
[Abstract]:The plate-bubble heat exchanger is a new type of high efficiency and compact heat exchanger. Compared with the traditional heat exchanger, it has many advantages such as high heat transfer efficiency, small volume and strong pressure bearing capacity, which can significantly improve the efficiency of heat energy utilization and reduce energy consumption. Extend service life. Therefore, the plate-bubble heat exchanger has a broad engineering application prospects. The plate-bubble heat exchanger with porous foam metal as the fluid channel expands the heat transfer area through the foam metal. Because the structure is highly compact, it is difficult to realize the measurement of the heat transfer surface wall temperature. The traditional testing method can not meet the test requirements. However, the existing numerical simulation methods can not accurately know the real flow and heat transfer due to the lack of a suitable hydrodynamic calculation model. In order to solve the above problems, the heat transfer and drag performance of plate-bubble heat exchanger is studied by means of experimental test and numerical simulation. The main research work is as follows: 1) based on single blow transient method, A test platform for heat transfer coefficient of heat transfer surface can be obtained without measuring wall temperature. Data acquisition and system control program are compiled. The system response characteristics and the error of test results are analyzed. To verify the stability and accuracy of the test system (.2) to design test samples with different structural parameters for plate-bubble heat exchangers, and to test them and obtain the heat transfer and resistance performance curves of each specimen. Based on the FLUENT porous media model, the integral geometric model of plate-bubble heat exchanger is established, and the fluid flow and temperature distribution in the heat exchanger are simulated and analyzed. The feasibility and accuracy of numerical simulation are verified by experiments. Based on the model, the influence of structural parameters on heat transfer and resistance performance of plate-bubble heat exchanger is further analyzed.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TK172

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王曉魯;姜培學(xué);單或W，

本文編號(hào)：2180729