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压力恢复系统是目前高能化学激光器的关键部件,它的总压损失会影响到整个激光器系统的出光能力和全系统的体积重量等关键技术指标。为了研究燃烧驱动CW DF/HF化学激光器总压损失,从一维气体动力学进行了理论分析。分析在激光器增益发生器内引起总压损失的主要因素,是研究高压力恢复激光器增益发生器的基础。主要讨论了引起总压损失的两个主要原因:第一,由于粘性摩擦引起的总压损失;第二,由于光学谐振腔中化学反应放热升温引起的总压损失。计算结果表明,燃烧升温对系统的压力恢复能力有较大的影响。
Pressure recovery system is the key component of high-energy chemical lasers. Its total pressure loss will affect the key technical indicators such as the light output of the whole laser system and the volume-weight of the whole system. In order to study the total pressure loss of a combustion-driven CW DF / HF chemical laser, a one-dimensional gas dynamics was theoretically analyzed. Analysis of the main contributor to the total pressure loss in the laser gain generator is the basis for the study of the high pressure recovery laser gain generator. Two main causes of total pressure loss are discussed: first, the total pressure loss due to viscous friction; and second, the total pressure loss due to the exothermic chemical reaction in the optical resonator. The calculation results show that the combustion temperature has a greater impact on the system’s pressure recovery capability.