葉輪切割對回收液力透平性能的影響
發(fā)布時(shí)間：2018-07-16 08:42
【摘要】：為研究葉輪切割對回收液力透平性能的影響,選取比轉(zhuǎn)速分別為46.0、55.7、63.2的離心泵反轉(zhuǎn)作回收液力透平,對各個(gè)葉輪外徑進(jìn)行四次切割,應(yīng)用CFD軟件對這三種比轉(zhuǎn)速液力透平在不同切割量下進(jìn)行數(shù)值計(jì)算,得到液力透平運(yùn)行的外特性曲線并分析其內(nèi)部流動(dòng)規(guī)律。結(jié)果表明,對于離心泵反轉(zhuǎn)作回收液力透平,透平的壓頭隨葉輪外徑切割量的增大而減小。在小流量工況下隨著葉輪外徑切割量的增加,葉輪內(nèi)部流動(dòng)損失逐漸減小,透平的水力效率呈現(xiàn)上升趨勢;在最優(yōu)工況和大流量工況下隨著葉輪外徑切割量的增加,葉輪內(nèi)部流動(dòng)更加紊亂,產(chǎn)生較大的能量損失,透平的水力效率呈現(xiàn)下降趨勢。
[Abstract]:In order to study the effect of impeller cutting on the performance of recovered hydraulic turbine, the centrifugal pump with specific rotational speed of 46.0 ~ 55.7 / 63.2 was selected as the recovery hydraulic turbine respectively, and the outer diameter of each impeller was cut four times. By using CFD software, the external characteristic curve of hydraulic turbine is obtained and its internal flow law is analyzed. The results show that the pressure head of the turbine decreases with the increase of the cutting volume of the impeller. Under the condition of small flow rate, with the increase of the cutting rate of impeller outer diameter, the internal flow loss of impeller decreases gradually, and the hydraulic efficiency of turbine increases, while under the optimal working condition and the high flow condition, with the increase of impeller outer diameter, the flow loss of impeller decreases gradually, and the hydraulic efficiency of turbine increases with the increase of outside diameter of impeller. The internal flow of impeller is more disordered, resulting in larger energy loss, and the hydraulic efficiency of turbine decreases.
【作者單位】： 蘭州理工大學(xué)能動(dòng)學(xué)院;甘肅省流體機(jī)械及系統(tǒng)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51569013)
【分類號】：TH311
[Abstract]:In order to study the effect of impeller cutting on the performance of recovered hydraulic turbine, the centrifugal pump with specific rotational speed of 46.0 ~ 55.7 / 63.2 was selected as the recovery hydraulic turbine respectively, and the outer diameter of each impeller was cut four times. By using CFD software, the external characteristic curve of hydraulic turbine is obtained and its internal flow law is analyzed. The results show that the pressure head of the turbine decreases with the increase of the cutting volume of the impeller. Under the condition of small flow rate, with the increase of the cutting rate of impeller outer diameter, the internal flow loss of impeller decreases gradually, and the hydraulic efficiency of turbine increases, while under the optimal working condition and the high flow condition, with the increase of impeller outer diameter, the flow loss of impeller decreases gradually, and the hydraulic efficiency of turbine increases with the increase of outside diameter of impeller. The internal flow of impeller is more disordered, resulting in larger energy loss, and the hydraulic efficiency of turbine decreases.
【作者單位】： 蘭州理工大學(xué)能動(dòng)學(xué)院;甘肅省流體機(jī)械及系統(tǒng)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51569013)
【分類號】：TH311
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1 典平鴿;楊孫圣;;葉輪進(jìn)口寬度對液力透平性能的影響[J];機(jī)械設(shè)計(jì)與研究;2012年02期
2 朱勇更;;葉輪尺寸參數(shù)對徑流渦輪性能特性的影響[J];國外內(nèi)燃機(jī)車;1973年07期
3 沈天耀;前向葉輪的流動(dòng)模型及其設(shè)計(jì)計(jì)算方法[J];清華大學(xué)學(xué)報(bào)(自然科學(xué)版);1980年02期
4 俞秀民;副葉輪密封的設(shè)計(jì)計(jì)算[J];潤滑與密封;1982年03期
5 施衛(wèi)東,曹衛(wèi)東,劉厚林,仇寶云,劉小龍;不同葉輪結(jié)構(gòu)型式對污水泵性能的影響[J];農(nóng)業(yè)工程學(xué)報(bào);2003年02期
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7 豐鎮(zhèn)平,徐進(jìn)峰,沈祖達(dá);向心透平葉輪進(jìn)口型線的改型分析[J];工程熱物理學(xué)報(bào);1990年01期
8 張振山;張艷偉;楊玉敏;馬s，
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