Vertical Launch System ejector interior ballistic source program 例程

以下是一个简单的Vertical Launch System ejector interior ballistic source program例程的代码：

import math

# Constants
g = 9.81        # gravitational acceleration (m/s^2)
rho = 1.225     # air density (kg/m^3)
Cd = 0.3        # drag coefficient
A = 0.02        # cross-sectional area of projectile (m^2)
m = 10          # mass of projectile (kg)
L = 1           # length of ejector (m)
d = 0.1         # diameter of ejector (m)
p0 = 1000       # chamber pressure (Pa)

# Calculations
V = math.pi * (d/2)**2 * L     # volume of ejector (m^3)
rho_ej = m/V                   # density of ejector gas (kg/m^3)
p_ej = p0 * (1 + 1.4*rho_ej/rho)**3.5     # pressure of ejector gas (Pa)
a_ej = math.sqrt(1.4 * 287 * 293)        # speed of sound in ejector gas (m/s)
v_ej = a_ej * math.sqrt(2*(1 - (p_ej/p0)**(1/7)))     # velocity of ejector gas (m/s)
F_ej = rho_ej * v_ej * A * Cd / 2     # force of ejector gas on projectile (N)
a_proj = F_ej / m      # acceleration of projectile (m/s^2)

# Output
print("Projectile acceleration:", round(a_proj, 2), "m/s^2")

这个例程计算了垂直发射系统抛射器内部弹道源的加速度。它使用一些常量和公式来计算抛射器气体的压力和速度，然后计算抛射器气体对弹丸的推力，并使用牛顿第二定律计算弹丸的加速度。