关系式

表达式

数据基础

B&W-2关系式

$\begin{array}{l}{q^{″}}_{CHF,EU}=3.155\times {10}^{-3}\left(1.155-16.025D_e\right)\\ \times [3.702\times {10}^7{\left(4.3604\times {10}^{-4}G\right)}^B\\ -48.21G{H}_{fg}]/\left[12.71{\left(2.252\times {10}^{-3}G\right)}^A\right]\\ A=0.712+3.006\times {10}^{-5}\left(p-13790\right)\\ B=0.834+9.93\times {10}^{-5}\left(p-13790\right)\end{array}$

$\begin{array}{l}{L}_h=1.83\text{m}\\ D_e=0.0051~0.0127\text{m}\\ p=13800~16550\text{kPa}\\ G=1020~5425\text{kg}/\left({\text{m}}^2\cdot \text{s}\right)\\ x=-0.03~0.2\end{array}$

$\begin{array}{l}{F}_c=\frac{{q^{″}}_{CHF,EU}}{{q^{″}}_{CHF,NU}}=\frac{1.025C{\displaystyle \underset{0}{\overset{z_{DNB,N}}{\int }}{q}^{″}\left(z\right)\exp \left[-C\left(l_{CHF}-z\right)\right]\text{d}z}}{q\left(z_{DNB,N}\right)\left[1-\exp \left(-C{z}_{DNB,EU}\right)\right]}\\ C=\frac{9.8{\left(1-X_{DNB}\right)}^{7.82}}{{\left(G/{10}^6\right)}^{0.457}}\end{array}$

W-3关系式

$\begin{array}{l}{q^{″}}_{CHF,EU}=3.14\times {10}^6\{\left(2.022-6.238\times {10}^{-8}p\right)\\ +\left(0.1722-1.43\times {10}^{-8}p\right)\times \exp \left[\left(18.177-5.987\times {10}^{-7}p\right)x_e\right]\}\\ \times \left[\left(0.1484-1.596x_e+0.1729x_e\left|x_e\right|\right)\times \frac{0.2049G}{{10}^6}+1.037\right]\\ \times \left(1.157-0.869x_e\right)\left[0.2664+0.8357\exp \left(-124D_e\right)\right]\\ \times \left[0.8258+0.341\times {10}^{-6}\left(h_{fs}-h_{f,in}\right)\right]\end{array}$

$\begin{array}{l}{L}_h=0.254~3.668\text{m}\\ D_e=0.00508~0.0178\text{m}\\ p=6895~15860\text{kPa}\\ G=\left(4.9~24.5\right)\times {10}^6\text{kg}/\left({\text{m}}^2\cdot \text{h}\right)\\ x=-0.03~0.2\end{array}$

$\begin{array}{l}{F}_c=\frac{{q^{″}}_{CHF,EU}}{{q^{″}}_{CHF,NU}}=\frac{C{\displaystyle \underset{0}{\overset{z_{DNB,N}}{\int }}{q}^{″}\left(z\right)\exp \left[-C\left(l_{CHF}-z\right)\right]\text{d}z}}{q\left(z_{DNB,N}\right)\left[1-\exp \left(-C{z}_{DNB,EU}\right)\right]}\\ C=\frac{12.64{\left(1-X_{DNB}\right)}^{4.31}}{{\left(G/{10}^6\right)}^{0.478}}\end{array}$