坡比对虹吸管路的稳定时间影响试验研究
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摘要
通过系列试验观察了虹吸管道安装高度为4 m及6 m时坡比及不同水头差下中行管路倾斜布置的虹吸管内的水气两相流动稳定虹吸时间的长短。通过试验研究发现,虹吸时间与水头差、安装高度及坡比均有关。虹吸时间随水头差及安装高度的增大而增大;在正、逆坡管路中,随着坡比的增大,管内伪空化现象逐渐减弱,稳定虹吸时间逐渐增大;坡比不变时,正坡管路虹吸时间均大于逆坡管路,各种工况下平坡管路的虹吸时间最短。
A series of tests were conducted to observe the installation height of 4 m and 6 m under different slope and different water heads the arrangement of siphon stable time of gas-liquid two-phase Flow. The experimental results show that siphon stable time is related to the head,installation height and slope. The siphon stable timeincreases with the increase of water head and installation height. As the slope angle of the pipeline(a positive slope or a negative slope)increases,the tube pseudo cavitation phenomenon is attenuated gradually and the siphon stable time increases gradually;At the slope constantly,the siphon time of positive slope is all greater than that of the negative slope pipe.The siphon time of flat slope is the shortest under the various working conditions.
A series of tests were conducted to observe the installation height of 4 m and 6 m under different slope and different water heads the arrangement of siphon stable time of gas-liquid two-phase Flow. The experimental results show that siphon stable time is related to the head,installation height and slope. The siphon stable timeincreases with the increase of water head and installation height. As the slope angle of the pipeline(a positive slope or a negative slope)increases,the tube pseudo cavitation phenomenon is attenuated gradually and the siphon stable time increases gradually;At the slope constantly,the siphon time of positive slope is all greater than that of the negative slope pipe.The siphon time of flat slope is the shortest under the various working conditions.
引文
[1]姜俊红,戴红霞.驼峰后带长直管虹吸式出水流道的水力特性试验研究[J].中国农村水利水电,2008(8):130-132.
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[5]TAJIMA Naoki,SADATOMI Michio,KAWAHARA Akimaro.Dredging of Sediment in Dam Utilizing Siphonage with SlidingOuter Tube[J].Japanese Journal of Multiphase Flow,2010,241:145-148.
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[11]张小莹,李琳,王梦婷,等.虹吸管气液两相流动压降特性试验[J].水利水电技术,2015,46(11):115-120.
[12]张小莹,李琳,王梦婷,等.虹吸管气液两相流过流能力影响因素分析[J].水电能源科学,2015,33(9):90-94.
[13]张小莹,李琳,王梦婷,等.真空管道水力特性试验研究[J].水力发电,2015,41(11):123-126.
[14]张小莹,李琳,张圣凯.基于实验模型的虹吸管道水气两相流动特性研究[J].新疆农业大学学报,2015,38(3):246-250.
[15]谭义海,李琳,邱秀云.真空有压管道内伪空化水流试验研究[J].中国农村水利水电,2015(10):100-103.
[2]冯光伟,胡晓,李庆亮.南水北调中线沁河倒虹吸管身结构动力分析[J].人民黄河,2009,31(7):62-63.
[3]王海周,赵辰.基坑降水技术在南水北调工程中的应用[J].人民黄河,2012,34(5):136-138.
[4]许晓华.位山灌区四河头倒虹吸防淤问题研究[J].人民黄河,2008,30(4):62-63.
[5]TAJIMA Naoki,SADATOMI Michio,KAWAHARA Akimaro.Dredging of Sediment in Dam Utilizing Siphonage with SlidingOuter Tube[J].Japanese Journal of Multiphase Flow,2010,241:145-148.
[6]YAN Tao,CHEN Li,XU Min.Siphon Pipeline ResistanceCharacteristic Research[J].Procedia Engineering,2012,28:53-58.
[7]熊晓亮.高扬程虹吸排水合理管径数值模拟[D].杭州:浙江大学,2014:23-59.
[8]马俊廷.虹吸式进水口在寒冷地区水电站的应用[J].小水电,2013(1):13-16.
[9]李琳,邱秀云,许史,等.长距离虹吸管道输水水力学模型试验研究[J].南水北调与水利科技,2010,8(3):106-109.
[10]许史,李琳,邱秀云,等.长距离虹吸管输水试验研究初探[J].中国农村水利水电,2010(3):70-72.
[11]张小莹,李琳,王梦婷,等.虹吸管气液两相流动压降特性试验[J].水利水电技术,2015,46(11):115-120.
[12]张小莹,李琳,王梦婷,等.虹吸管气液两相流过流能力影响因素分析[J].水电能源科学,2015,33(9):90-94.
[13]张小莹,李琳,王梦婷,等.真空管道水力特性试验研究[J].水力发电,2015,41(11):123-126.
[14]张小莹,李琳,张圣凯.基于实验模型的虹吸管道水气两相流动特性研究[J].新疆农业大学学报,2015,38(3):246-250.
[15]谭义海,李琳,邱秀云.真空有压管道内伪空化水流试验研究[J].中国农村水利水电,2015(10):100-103.