Method for testing hydrodynamic performance of water surface air vehicle in transverse inclination state

Abstract

The invention provides a method for testing hydrodynamic performance of a water surface air vehicle in a transverse inclination state. A testing device is installed first and electric signal connection and testing are achieved, and the testing device comprises a water surface air vehicle model, a water power high-speed test carriage, a transverse inclination moment measurement device and a sensor system. Secondly the water power high-speed test carriage moves on a track and drives the model to move on the water surface, after the carriage is accelerated to an operation speed meeting test requirements and is stabilized, a data acquirer is started to acquire sensor test data, acquisition is stopped after the carriage runs stably for a period of time, and the carriage is braked and decelerated till stop; after the testing process ends, the effectiveness of acquired test data is analyzed, effective test parameters including model gravity center, transverse inclination angle, weight, speed, gravity center position heaving value, dip angle value, bow, midship and stern acceleration amplitude, and force and moment measured by a six-component balance are recorded, and hydrodynamic performance is analyzed by comparing the test parameters with a design value or a normal value.

Description

technical field [0001] The invention relates to the technical field of hydrodynamic testing, in particular to a method for testing the hydrodynamic performance of a water surface aircraft in a heeling state. Background technique [0002] Surface aircraft is a special aircraft that can take off and land on the water. It plays an important role in both civilian and military missions, such as material transportation, patrol and investigation, maritime search and rescue, forest fire fighting, etc. With the development of national defense and national The vigorous development of the economy has also put forward higher and higher requirements for its performance. The hydrodynamic performance of the aircraft when it moves on the water surface greatly affects the performance of the whole machine. Large vertical acceleration will be generated, which will seriously affect the crew's control of the aircraft; second, if the water surface movement resistance is too large, the aircraft m...

AI Technical Summary

Problems solved by technology

The hydrodynamic performance of the aircraft when it moves on the water surface greatly affects the performance of the whole machine. Large vertical acceleration will be generated, which will seriously affect the crew's control of the aircraft; second, if the water surface movement resistance is too large, the aircraft may not be able to take off due to the lack of residual pulling force; third, the aircraft will leave the equilibrium position due to external forces such as crosswind If the heel restoring moment is not enough when tilting, it may cause it to overturn

[0003] Judging the hydrodynamic performance of a surface aircraft is generally simulated by a pool drag test of a scaled model. In the test, the degree of freedom in the rolling direction is generally limited, and the real aircraft is under the real sea conditions of crosswinds and waves. Under the action of the propeller torque, there will be a rolling motion. If the restoring torque is too low, it will affect the stability of the aircraft or even overturn, and there is a certain difference in the hydrodynamic performance under the roll state and the no roll state.

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