Introduction to the internal structure of the aircraft simulation cabin
The aircraft simulation cabin is a large-scale aircraft test structure installed on a carrier-based aircraft, which can be used to study the vibration characteristics of the carrier-based aircraft during the ejection-glide stage. This has many advantages. There is a certain risk of testing. The carrier-based aircraft tests of the US and Brazilian aircraft carriers follow this process. The aircraft simulation cabin can replace the carrier-based aircraft for the vibration test of the ejection-glide phase, and the front cockpit is installed on the ejection mass vehicle.
The aircraft simulation cabin is divided into front and rear cabins, and the middle is separated by a partition. The electronic equipment in the front cabin is a whole. Due to the low temperature required, the rear cabin is mainly composed of 4 electronic equipment boxes, using nitrogen as the cooling medium. Air Cold plate cooling method. Because the nacelle is relatively flying, an annular I-shaped reinforced frame is installed on the wall. In order to facilitate the simulation research, the entire pod is divided into front and rear cabins to study separately, and the structure of the pod is abstracted and simplified. One part of the cooling air from the air supply duct in the rear cabin enters the cold plate to directly cool the equipment, the other part enters the cooling chamber in the cabin, and the other part of the air is circulated to the entire refrigeration system through the return air pipe. Since the main discussion in this article is under certain refrigeration conditions , the change process of the cooling load and main temperature parameters of the cockpit in the entire flight envelope, ignoring the simulation calculation of the cooling liquid flow distribution part determined by the structural parameters. The end point cooling liquid distribution results under a certain air supply volume are directly quoted. Therefore, , the pod heat load simulation model is mainly composed of energy differential equation and heat transfer equation. According to the idea of MA-TRIXx simulation software module modeling and the specific structure of the pod, the whole pod can be divided into 4 modules, including the whole pod. Wall, cabin electronics, cooling gas and input. Each module is composed of smaller modules such as heat transfer coefficient, physical property calculation, etc., with 5 input and output parameters.