Water plane wave water surface take-off and landing water-gas two-phase flow numerical simulation method

Abstract

The invention provides a water plane wave water surface take-off and landing water-gas two-phase flow numerical simulation method, which is based on an integral dynamic grid technology and a speed inlet wave making technology, and improves a grid division strategy and a flow field initialization method, thereby realizing unsteady flow field calculation of water plane wave water surface take-off and landing. In order to research the problem of wave dampening of a water surface aircraft, according to the method, an initial phase item and an initial balance position item are added in a wave surface equation, a wave velocity field and a pressure field function, so that phase deviation of waves in a computational domain along a propagation direction and vertical deviation of a wave balance position are realized; and therefore, the wave is in contact with the object in an extremely short solving time, and the time of waiting for the head wave by the object is saved. Compared with the conventional dynamic grid method, the method has the advantages that the grid quantity can be reduced, the grid utilization rate can be improved, and higher calculation speed can be obtained while the solving precision is ensured.

Description

technical field [0001] The invention relates to the field of aircraft take-off and landing tests, in particular to a numerical simulation method for water-air two-phase flow of a seaplane taking off and landing on a wave surface. Background technique [0002] Seaplanes are different from conventional aircraft. According to their mission requirements, they should have the ability to take off and land on the water, and be able to operate under certain sea conditions. Therefore, evaluating the take-off and landing capability of a seaplane on wave water is very important for flight safety. At present, the research methods for this problem are mainly divided into three methods: experimental research, theoretical calculation and numerical simulation. Experimental research requires a lot of laboratory construction costs, and the test data is often limited by equipment conditions, and the test results are relatively simple; theoretical calculations use empirical formulas to estimat...

AI Technical Summary

Problems solved by technology

However, when the aircraft lands on the still water surface, the distance between the body and the free liquid surface only needs to adjust the horizontal position of the liquid surface. For wave landing, not only the balance position of the wave needs to be adjusted, but also the horizontal relative position between the wave and the body needs to be adjusted, namely The initial phase of the wave is required, and the research work in this area is not yet perfect, and it will also be the content that this patent will focus on

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