摘要
本文用四种体型的消力池模型,研究了水跃首部佛洛德数F_1≤4.5的消力池护坦板上水流脉动压力的频率特性。研究结果表明,对应于三种水跃形态,即波状水跃(1.0<F_1≤1.7),弱水跃(1.7<F_1≤2.5)以及颤动水跃(2.5<F_1≤4.5),用于设计的水流脉动压力频率f_s,可分别采用0.4≤f_s≤1.1HZ,0.2≤f_s≤2.5HZ,以及0.4≤f_s≤3.3HZ。对于三种水跃形态,f_s的可靠度均约为90％。这对于初步设计,是有足够的精度。
Using four types of stilling basin model, this paper studies the frequency properties of fluctuating pressure acting on the stilling basin apron with Froude number, F1≤4. 5.
The investigation results show that three ranges of frequency fs,0.4< fs<1.1HZ, 0.2<fs<2.5HZ, and 0.4<fs<3.3HZ, can be used as the design frequency of the fluctuating pressure acting on the stilling basin apron for three patterns of hydraulic jump, undular jump (1.0<F1<1.7), wear jump(1.7<F1<2.5), and osciliating jump(2.5<F1<4.5). The reliability of fs for three patterns of hydraulic jump is about 90%. It is shown that the accuracy of fs is satisfactory in primary design.
出处
《水力发电学报》
EI
CSCD
北大核心
1991年第3期19-26,共8页
Journal of Hydroelectric Engineering
