多层泄孔运行方式对二级斜坡进口浅水垫消力池水力特性的影响
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摘要
针对某水电站工程消力池体型不合理及调度运行方式不当而导致池内流态不良、消力池临底流速过大、底板冲刷破坏等问题,通过1∶45模型试验分析了二级斜坡进口式浅水垫消力池在多层泄洪孔不同运行方式下的水力特性。结果表明,新提出的消力池体型能够明显改善面流流态及水跃不稳定等问题,针对该工程,优先采用溢流表孔泄流比采用冲沙底孔泄流池内流态更佳,消力池临底及岸边流速更低,消能防冲效果更好。
To solve the problems of bad flow regime and large bottom velocity caused by unreasonable design of stilling basin and improper operation mode of a certain hydropower project with multi-layer discharging holes,a new type of SBWWC with two-stage-slope inlet was proposed and a hydraulic model test with scale 1∶45 was conducted to compare the effects of different operation mode of the discharging holes on the hydraulic characteristics of the stilling basin.The results show that the newly proposed stilling basin can significantly improve the situation of the surface flow regime and instability of hydraulic jump.For this project,it is better to use overflow surface holes than the bottom holes to release flood from the view of energy dissipation.The flow regime is better,the bottom velocity and the shore velocity is lower.
To solve the problems of bad flow regime and large bottom velocity caused by unreasonable design of stilling basin and improper operation mode of a certain hydropower project with multi-layer discharging holes,a new type of SBWWC with two-stage-slope inlet was proposed and a hydraulic model test with scale 1∶45 was conducted to compare the effects of different operation mode of the discharging holes on the hydraulic characteristics of the stilling basin.The results show that the newly proposed stilling basin can significantly improve the situation of the surface flow regime and instability of hydraulic jump.For this project,it is better to use overflow surface holes than the bottom holes to release flood from the view of energy dissipation.The flow regime is better,the bottom velocity and the shore velocity is lower.
引文
[1]李天翔.浅水垫消力池水力特性研究[D].成都:四川大学,2006.
[2]刘达,李连侠,廖华胜,等.不同入流角度对浅水垫消力池水力特性的影响研究[J].水力发电,2016,42(4):49-52.
[3]褥勇伸,廖华胜,李连侠,等.浅水垫消力池的数值模拟与实验研究[J].水力发电学报,2010,29(2):36-41,126.
[4]付海波,杨磊,唐培磊,等.多孔水闸调度运行方式研究[J].水利水电技术,2015,46(12):100-104.
[5]黄春茜,陈理真.闸坝泄流调度研究[J].长春工程学院学报:自然科学版,2006,7(1):48-50.
[6]田畅,王均星,彭诚.双台子多孔闸调度对消能效果的影响试验研究[J].水电能源科学,2017,35(10):104-107.
[7]张文传,王均星,刘永斌,等.低水头多孔闸调度水力冲淤模型试验研究[J].水电能源科学,2017,35(1):69-72.
[2]刘达,李连侠,廖华胜,等.不同入流角度对浅水垫消力池水力特性的影响研究[J].水力发电,2016,42(4):49-52.
[3]褥勇伸,廖华胜,李连侠,等.浅水垫消力池的数值模拟与实验研究[J].水力发电学报,2010,29(2):36-41,126.
[4]付海波,杨磊,唐培磊,等.多孔水闸调度运行方式研究[J].水利水电技术,2015,46(12):100-104.
[5]黄春茜,陈理真.闸坝泄流调度研究[J].长春工程学院学报:自然科学版,2006,7(1):48-50.
[6]田畅,王均星,彭诚.双台子多孔闸调度对消能效果的影响试验研究[J].水电能源科学,2017,35(10):104-107.
[7]张文传,王均星,刘永斌,等.低水头多孔闸调度水力冲淤模型试验研究[J].水电能源科学,2017,35(1):69-72.