The charge utilization ratio is high for multi-point ignition tube experiments in a high-pressure gun, but the chamber pressure wave is high.

某高膛压火炮试验中发现多点点火方案的装药利用率较高，但膛内压力波较大。

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In order to reduce pressure wave and improve the solution, numerical simulation has been made of the process of multi-point ignition by applying the two-phase flow internal ballistics theory.

为了减小膛内压力波、完善多点点火方案，应用两相流内弹道理论对该炮的多点点火过程进行了数值模拟，数值模拟结果与试验结果有较好的一致性。

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The area near an uphill incline is considered a collection point for fuel and ignition sources, and it's possible a piece of debris fell into the tinder-dry brush early Thursday and sparked the fire, Piranio said.

NPR: Cause Of California Wildfire Appears Accidental