太陽能熱發(fā)電并聯(lián)管內(nèi)汽液兩相流不穩(wěn)定性研究
[Abstract]:The two-phase flow instability of the vapor liquid in the parallel heating pipeline generally occurs in the water wall of the boiler, the steam generating device, the heat exchanger and the boiling water reactor. The root cause of the flow drift in the parallel tube is the presence of the negative slope portion of the N-type curve that is specific to the pressure drop and the flow relationship. The most economical and effective way to eliminate this instability is to add a choke coil at the inlet of the heating pipe, so that the characteristic curve presents a tendency of single-value growth. but at the same time, the consumption of the feed pump at the inlet of the pipeline is increased, so the most suitable throttling coefficient is calculated. The calculation of the pressure drop required for the inlet and outlet of the heating pipe in the actual project and the relationship with the inlet flow are of vital importance to the design, safety and operation of the equipment. The pressure drop flow characteristic curve is not only the basis for analyzing the static flow drift characteristic in the pipeline, but also the base of the pressure drop and the pulsation of the density wave. In this paper, the pressure and inlet temperature of the pipeline are known to be used to calculate the inlet pressure in the range of the critical pressure. and taking into account the different pressure ranges, selecting a suitable calculation model: a sub-phase model at low pressure and a homogeneous model under high pressure; and selecting an empirical formula of the most suitable cross-section gas-containing rate under different working conditions. The calculation program of the pressure drop in horizontal and vertical pipes in different cases is prepared by using MATLAB. At the same time, the minimum pipeline inlet throttle coefficient is calculated for the constant flow drift phenomenon in the parallel pipeline, the diameter of the most suitable throttle valve required by the inlet is calculated by the throttle coefficient, and a visual calculation section is written through the GUI. In this paper, on the basis of the calculation program, the flow of a specific needle in the parallel tube of the actual tank type solar direct steam generation system is studied and verified. The effect of different parameters on the flow drift characteristics is analyzed to optimize the operation. Finally, the minimum mass flow required to avoid the stratified flow in two parallel pipelines is studied, and the characteristics of different methods are compared.
【學(xué)位授予單位】:華北電力大學(xué)(北京)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TM615
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 王冠群;汽液兩相噴嘴中臨界流的簡(jiǎn)化數(shù)學(xué)模型[J];上海機(jī)械學(xué)院學(xué)報(bào);1988年02期
2 呂曉明,丁忠滿;水平管道中汽液兩相流的流型描述及測(cè)量方法的研究[J];水利學(xué)報(bào);1990年10期
3 尚智,楊瑞昌;一維管道汽液兩相流動(dòng)的小波數(shù)值瞬態(tài)計(jì)算[J];熱能動(dòng)力工程;2002年05期
4 田疆,劉繼平,嚴(yán)俊杰,陳國(guó)慧;超音速汽液兩相流升壓加熱器用于供暖系統(tǒng)的研究[J];熱力發(fā)電;2003年10期
5 郭烈錦;陳學(xué)俊;;管內(nèi)汽液兩相環(huán)狀流轉(zhuǎn)變的機(jī)理研究[J];核科學(xué)與工程;1992年02期
6 楊瑞昌,鄭榮釧,沈幼庭;水平加熱管束間汽液兩相內(nèi)循環(huán)特性的研究[J];工程熱物理學(xué)報(bào);1997年03期
7 關(guān)麗君,田德允;汽液兩相流不穩(wěn)定性實(shí)驗(yàn)研究[J];佳木斯工學(xué)院學(xué)報(bào);1998年01期
8 楊瑞昌,鄭榮釧,王彥武,周立加;水平加熱管束間三維汽液兩相流特性的研究[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);2000年02期
9 何仰朋,嚴(yán)俊杰,劉繼平,趙福宇,林萬超;變截面通道內(nèi)超音速汽液兩相流升壓性能計(jì)算模型的研究[J];核動(dòng)力工程;2004年02期
10 李文軍;何仰鵬;種道彤;嚴(yán)俊杰;李波;;環(huán)周進(jìn)汽型超聲速汽液兩相流升壓裝置性能計(jì)算分析[J];工程熱物理學(xué)報(bào);2013年01期
相關(guān)會(huì)議論文 前6條
1 黃興華;陸震;;冷凝器殼側(cè)汽液兩相流動(dòng)和傳熱的數(shù)值研究[A];上海市制冷學(xué)會(huì)二○○一年學(xué)術(shù)年會(huì)論文集[C];2001年
2 徐美倩;錢仁淵;;汽液兩相雙循環(huán)相平衡測(cè)定裝置[A];第三屆全國(guó)化學(xué)工程與生物化工年會(huì)論文摘要集(上)[C];2006年
3 邵樹峰;嚴(yán)俊杰;劉繼平;;兩級(jí)進(jìn)水超音速汽液兩相流升壓器的性能研究[A];中國(guó)動(dòng)力工程學(xué)會(huì)第三屆青年學(xué)術(shù)年會(huì)論文集[C];2005年
4 胡黨輝;;汽液兩相流激波升壓裝置改造及其經(jīng)濟(jì)性分析[A];中國(guó)動(dòng)力工程學(xué)會(huì)第三屆青年學(xué)術(shù)年會(huì)論文集[C];2005年
5 董國(guó)強(qiáng);周亞素;孫韶;石成君;;水平管降膜蒸發(fā)器管內(nèi)汽液兩相流動(dòng)與傳熱效果的數(shù)值分析[A];上海市制冷學(xué)會(huì)2013年學(xué)術(shù)年會(huì)論文集[C];2013年
6 楊印廷;;汽液兩相流裝置在火電廠中的應(yīng)用[A];全國(guó)火電大機(jī)組(300MW級(jí))競(jìng)賽第36屆年會(huì)論文集(上冊(cè))[C];2007年
相關(guān)博士學(xué)位論文 前1條
1 康燦;錯(cuò)列葉柵內(nèi)部水動(dòng)力學(xué)特性與汽液兩相流動(dòng)的研究[D];江蘇大學(xué);2007年
相關(guān)碩士學(xué)位論文 前4條
1 趙黎偉;太陽能熱發(fā)電并聯(lián)管內(nèi)汽液兩相流不穩(wěn)定性研究[D];華北電力大學(xué)(北京);2016年
2 吳巍;管內(nèi)汽液兩相流動(dòng)模型分析[D];重慶大學(xué);2014年
3 胡志剛;汽心泵流場(chǎng)計(jì)算與數(shù)值模擬[D];南京航空航天大學(xué);2010年
4 白原原;真空條件下燃油霧化和汽化特性研究[D];北京化工大學(xué);2013年
,本文編號(hào):2358807
本文鏈接:http://sikaile.net/kejilunwen/dianlidianqilunwen/2358807.html