namespace Yw.Epanet
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{
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/// <summary>
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/// 计算辅助类
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/// </summary>
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public class CalcuHelper
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{
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/// <summary>
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/// 计算流速 m/s
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/// </summary>
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/// <param name="flow">流量m³/h</param>
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/// <param name="diameter">直径 mm</param>
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/// <returns>流速 m/s</returns>
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public static double CalcuVelocity(double flow, double diameter)
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{
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if (diameter <= 0)
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{
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return default;
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}
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// 单位转换
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var q = flow / 3600;// m³/h → m³/s
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var d = diameter / 1000; // mm → m
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// 计算横截面积
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var a = Math.PI * Math.Pow(d, 2) / 4;
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// 计算流速 (m/s)
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double velocity = q / a;
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return velocity;
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}
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/// <summary>
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/// 计算局部损失
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/// </summary>
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/// <param name="k">损失系数</param>
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/// <param name="velocity">流速m/s</param>
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/// <returns>局部损失 m</returns>
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public static double CalcuMinorLoss(double k, double velocity)
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{
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return k * Math.Pow(Math.Abs(velocity), 2) / (2 * ConstParas.g);
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}
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/// <summary>
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/// 计算能量
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/// </summary>
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/// <param name="flow">流量 m³/h</param>
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/// <param name="head">水头 m</param>
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/// <returns>能量 w</returns>
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public static double CalcuEnergy(double flow, double head)
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{
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var energy = Math.Abs(flow * head);
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energy = energy * ConstParas.WaterDensity * ConstParas.g / 3600;
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return energy;
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}
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}
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}
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