本文選題：超臨界壓力 + 航空煤油�。� 參考：《推進(jìn)技術(shù)》2016年03期

【摘要】：為了深入理解超燃沖壓發(fā)動(dòng)機(jī)再生冷卻系統(tǒng)中碳?xì)淙剂系牧鲃?dòng)傳熱規(guī)律,對(duì)豎直上升圓管內(nèi)RP-3航空煤油的超臨界對(duì)流換熱做了實(shí)驗(yàn)研究。詳細(xì)探討了質(zhì)量流速、熱流密度、壓力等對(duì)管壁溫度和換熱系數(shù)分布的影響,并擬合得到了過渡區(qū)和湍流區(qū)的對(duì)流換熱經(jīng)驗(yàn)關(guān)系式。結(jié)果表明:近臨界和較高壓力下的換熱呈現(xiàn)出迥異的特征。在近臨界壓力過渡區(qū)的高進(jìn)口過冷度工況,近壁流體密度和黏度的綜合作用引起了熱聲振蕩現(xiàn)象,使換熱顯著增強(qiáng);而主流溫度處于擬臨界溫度附近時(shí)卻出現(xiàn)了由近壁流體體積急劇膨脹導(dǎo)致的傳熱惡化現(xiàn)象。在高壓力下,過渡區(qū)熱聲振蕩和湍流區(qū)傳熱惡化都不會(huì)出現(xiàn),但低質(zhì)量流速時(shí)強(qiáng)浮升力使過渡區(qū)進(jìn)口段出現(xiàn)了嚴(yán)重的壁溫飛升現(xiàn)象。新關(guān)系式具有良好的適用性,預(yù)測(cè)值與實(shí)驗(yàn)值的相對(duì)誤差在20%以內(nèi)。
[Abstract]:In order to understand the flow and heat transfer law of hydrocarbon fuel in regenerative cooling system of scramjet, the supercritical convection heat transfer of RP-3 aviation kerosene in vertical riser is studied experimentally. The effects of mass flow rate, heat flux and pressure on the distribution of temperature and heat transfer coefficient of the tube wall are discussed in detail, and the empirical equations of convection heat transfer in the transition region and turbulent zone are obtained. The results show that the heat transfer at near critical pressure and high pressure is very different. Under the condition of high inlet undercooling in the near critical pressure transition region, the combined action of density and viscosity of the near wall fluid causes thermoacoustic oscillation, and the heat transfer is enhanced significantly. However, when the mainstream temperature is near the pseudo-critical temperature, the phenomenon of heat transfer deterioration caused by the rapid expansion of the near wall fluid volume appears. Under high pressure, neither thermoacoustic oscillation nor heat transfer deterioration in turbulent zone will occur, but strong buoyancy at low mass velocity makes the wall temperature rise seriously at the inlet of the transition zone. The new relation has good applicability and the relative error between the predicted value and the experimental value is within 20%.
【作者單位】： 大連理工大學(xué)能源與動(dòng)力學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51576027)
【分類號(hào)】：V312

【相似文獻(xiàn)】

相關(guān)期刊論文 前7條

1 曹效文;熱聲振蕩在液面探測(cè)中的應(yīng)用[J];物理;1977年05期

2 張曉青;蔣華;胡興華;柳玉林;;熱聲振蕩的格子氣模擬[J];華中科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年07期

3 楊亞晶;王萬征;;Rijke管熱聲不穩(wěn)定的實(shí)驗(yàn)研究[J];西安交通大學(xué)學(xué)報(bào);2014年05期

4 陳國(guó)邦;熱聲振蕩及其在制冷中的應(yīng)用[J];低溫與特氣;1996年04期

5 郭軼楠;雷剛;王天祥;王凱;孫大明;;Taconis熱聲振蕩研究進(jìn)展[J];低溫工程;2014年02期

6 劉繼平,嚴(yán)俊杰,林萬超,邢秦安,陳國(guó)慧;Rijke管內(nèi)熱聲振蕩機(jī)理的一種新解釋[J];西安交通大學(xué)學(xué)報(bào);2001年03期

7 ;[J];;年期

相關(guān)會(huì)議論文 前2條

1 張鵬;王如竹;村上正秀;;低溫傳熱中的熱聲振蕩現(xiàn)象研究[A];制冷空調(diào)新技術(shù)進(jìn)展——第四屆全國(guó)制冷空調(diào)新技術(shù)研討會(huì)論文集[C];2006年

2 張鵬;王如竹;村上正秀;;低溫傳熱中的熱聲振蕩現(xiàn)象[A];第四屆全國(guó)制冷空調(diào)新技術(shù)研討會(huì)論文集[C];2006年

，

本文編號(hào)：1831941