The velocity change of instantaneous negative pressure wave along the pipeline is analyzed when hot oil is transported. Two searching methods are applied to locate leakage through numerical integral.
分析了热油输送管道沿程瞬态负压波传播速度的变化，采取两种搜索方法数值积分求解泄漏点位置。
It is demonstrated that negative entropy flow exists in shock wave and shock wave is a kind of heat wave which transfers heat with traveling wave velocity.
证明了激波是一种负熵流波，是依靠激波波速输运热流的热波。
Meanwhile, it is also observed that the regions of negative anomalous P-wave velocity are enlarged by steps as the central loading is increased.
同时还观测到，P波速度负异常区随中心压力增加逐步扩大。
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