For the case of hydrodynamic noise, in which the range of the frequency-thickness product of interest is relatively low, the symmetric zero-order mode dominates the noise radiation.
对于水动力噪声情况，感兴趣的频率厚度乘积相当低，这时零阶对称模式对噪声辐射起主要作用。
2
The influence of supercritical boiler's hydrodynamic characteristics to the outlet temperature of water wall's lower radiation zone is analyzed.