Chapter 7: Quasi-One-Dimensional Nozzle Flow

考虑流过拉伐尔喷管的准一维定常等熵流（准一维：管道横截面积在变化）

\[ \begin{aligned} & \text{连续性方程：} \qquad \rho_1 V_1 A_1 = \rho_2 V_2 A_2 \\ & \text{动量方程：} \qquad p_1 A_1 + \rho_1 V_1^2 A_1 + \int_{A_1}^{A_2} p \, \mathrm{d} A = p_2 A_2 + \rho_2 V_2^2 A_2 \\ & \text{能量方程：} \qquad h_1 + \frac{V_1^2}{2} = h_2 + \frac{V_2^2}{2} \end{aligned} \]