水轮机稳定运行对引水系统几何参数的要求

摘要

在Thoma1910年计算调压井水位波动数学方程的基础上，进一步计算出表征引水系统儿何参数的-个固有特征值--自然流量Qno再深入分析证明，当水轮机的运行流量Q0＜(0.15～0.25)Qn时，这种运行可能会出现振动，表征出了水轮机稳定运行对引水系统几何参数的要求条件，该结论与Thoma的调压井水位波动稳定条件具有同等的工程参考价值及可信程度，因为它们都来自于同一的Thoma模型。%Based on Thoma' s equation used to analyze the water levelfluctuation of surge tank in 1910 further to have calculated theharacteristic value-natural flow Qn of lead water system indicating geometric parameters, and certificated that the hydraulic turbine may be arisen oscillation when its operating flow Q 0 ＜ ( 0.15 ～ 0.25) Qn, there is a stable operatin reqirement of hydraulic turbine with regard to geometrie parameters of lead water system. The both of this and thoma' s requirements have a equal reference value and trust worthness, because they are all stem from the same Thoma's equation