CAJ | 학술논문

抽水蓄能电站进／出水口有进流和出流两种工况，进／出水口水流呈双向流动，水力条件较复杂，对水流流态要求较高。因此，为观测各工况水流流态和水头损失大小，进一步完善进／出水口的结构布置和尺寸，对下库进／出水口进行了数值模拟计算。根据隧洞中水流的运动为有压流这一特点，建立了隧洞压力驱动三维水动力模型，考虑了进／出水口上游一定长度隧洞在内的三维空间计算域，采用k－ε紊流模型，通过对隧洞内压力流的数值模拟，分析研究了各工况下流道分离比、流速、流态及水头损失等水力特性。研究表明：将中边孔导流隔墩尾部位置进行调整能有效改善中、边孔分流比，流速不均匀系数也有所改善，水头损失无明显变化。
추수축능전참진／출수구유진류화출류량충공황，진／출수구수류정쌍향류동，수력조건교복잡，대수류류태요구교고。인차，위관측각공황수류류태화수두손실대소，진일보완선진／출수구적결구포치화척촌，대하고진／출수구진행료수치모의계산。근거수동중수류적운동위유압류저일특점，건립료수동압력구동삼유수동력모형，고필료진／출수구상유일정장도수동재내적삼유공간계산역，채용k－ε문류모형，통과대수동내압력류적수치모의，분석연구료각공황하류도분리비、류속、류태급수두손실등수력특성。연구표명：장중변공도류격돈미부위치진행조정능유효개선중、변공분류비，류속불균균계수야유소개선，수두손실무명현변화。
In order to observe the condition of the flow regime and head loss size,to further improve the structure arrangement and size of in-let/outlet,optimize the in and out of the nozzle arrangement,especially for a numerical simulation for inlet/outlet under the library. Accord-ing to the tunnel pressure flow,the movement of water in the characteristics of tunnel pressure driven three-dimensional hydrodynamic mod-el was established,considering the in and out of the gate lengths upstream tunnel,three-dimensional calculation domain,the k - epsilon turbulence model,through the numerical simulation of the pressure in the tunnel flow under various operating conditions analysis to study the flow separation ratio,flow velocity,flow pattern and hydraulic characteristics such as head loss. Study shows that by moving the position of the side hole diversion pier end insulation,can effectively improve,side hole in the diversion ratio,velocity of non-uniform coefficient also has been improved,and no obvious change in head loss.