For the different types of throttled surge tanks used in hydropower systems, it is important to comprehensively know the throttle's head loss characteristics for exact surge analysis and transient control. Herein, a general and complete experimental setup was designed to steadily reproduce the 12 typical flow regimes occurring at the surge tank and thus conduct comprehensive experimental research on throttle head loss coefficients. Furthermore, an extended mathematical model for the surge tank was derived by inputting experimental data on the throttle's head loss coefficients to surge analysis. Through experimental research, the throttle's head loss coefficients were determined by fitting formulae relative to the different flow regimes and discharge ratios; via a detailed case analysis, the differences in the head loss characteristics for different throttle types were accurately determined. It was demonstrated that the throttle's head loss coefficient varies with discharge ratio under different flow regimes and found that the experimentally obtained flow coefficients for different throttle types are more accurate and clearly reveal the difference of throttles’ head loss characteristics. The extended mathematical model for the throttled surge tank can provide more accurate simulation results and guidance for its engineering design and layout.

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基于实验和模拟的调压阀节流压头损失系数研究

对于水电系统中使用的不同类型的节流调压罐，全面了解节流阀的压头损失特性对于精确的调压分析和瞬态控制很重要。在此，设计了一个一般而完整的实验装置，以稳定地再现调压罐处出现的12种典型流态，从而对节流阀头损失系数进行全面的实验研究。此外，通过将节气门的水头损失系数的实验数据输入到喘振分析中，得出了喘振罐的扩展数学模型。通过实验研究，根据不同的流态和流量比，通过拟合公式确定了节气门的水头损失系数。通过详细的案例分析，准确确定了不同油门类型的压头损失特性的差异。结果表明，在不同的流态下，节气门的水头损失系数随流量比的变化而变化，发现通过实验获得的不同节气门类型的流量系数更加准确，清楚地揭示了节气门的水头损失特性的差异。节流式调压罐的扩展数学模型可以为工程设计和布局提供更准确的仿真结果和指导。在不同的流态下，水头损失系数随排放比的变化而变化，发现通过实验获得的不同节流阀类型的流量系数更加准确，清楚地揭示了节流阀的水头损失特性的差异。节流式调压罐的扩展数学模型可以为工程设计和布局提供更准确的仿真结果和指导。在不同的流态下，水头损失系数随排放比的变化而变化，发现通过实验获得的不同节流阀类型的流量系数更加准确，清楚地揭示了节流阀的水头损失特性的差异。节流式调压罐的扩展数学模型可以为工程设计和布局提供更准确的仿真结果和指导。