Yan Yan, Chen Chen, Peng Xiaotian, Wang Chenchen, Feng Shiyu
College of Mechanical and Electrical Engineering, Xi'an Polytechnic University, Xi'an, People's Republic of China.
Key Laboratory of Aircraft Environment Control and Life Support of MIIT, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, People's Republic of China.
Sci Rep. 2022 Nov 30;12(1):20671. doi: 10.1038/s41598-022-24419-8.
The pressure relief door (PRD) is a vital structure to ensure the safety and reliability of the engine. This paper established a zero-dimensional transient simulation mathematical model to study the plenum compartment pressure threshold and maximum opening angle effects on the nacelle pressure relief process under different opening modes. Then, a computational fluid dynamics model verified by experimental literature data was used to simulate the nacelle pressure relief process and to determine the influence of two different opening modes on the force and discharge characteristics of the PRD. The results of this study show that different opening modes strongly impact the nacelle pressure relief process. Reducing the nacelle compartment pressure threshold of the PRD opening can reduce the time required for the pressure relief process to reach the equilibrium stage. Reducing the maximum opening angle may increase the nacelle compartment pressure during the equilibrium stage. In addition, under the same nacelle compartment pressure thresholds and maximum opening angles, the pressure relief process under the vertical opening mode can reach a lower nacelle compartment pressure during the pressure relief equilibrium stage compared to that under the horizontal opening mode. Therefore, the vertical opening mode is better than the horizontal opening mode. This paper provides two lower calculation costs and high accuracy research models for studying the nacelle pressure relief process.
泄压门（PRD）是确保发动机安全可靠的关键结构。本文建立了零维瞬态仿真数学模型，以研究在不同开启模式下，增压舱压力阈值和最大开启角度对机舱泄压过程的影响。然后，使用经实验文献数据验证的计算流体动力学模型来模拟机舱泄压过程，并确定两种不同开启模式对PRD的力和排放特性的影响。本研究结果表明，不同的开启模式对机舱泄压过程有很大影响。降低PRD开启时的机舱增压舱压力阈值，可以减少泄压过程达到平衡阶段所需的时间。减小最大开启角度可能会增加平衡阶段的机舱增压舱压力。此外，在相同的机舱增压舱压力阈值和最大开启角度下，与水平开启模式相比，垂直开启模式下的泄压过程在泄压平衡阶段可以达到更低的机舱增压舱压力。因此，垂直开启模式优于水平开启模式。本文为研究机舱泄压过程提供了两种计算成本较低且精度较高的研究模型。
