A Circular Reverberation Pool for Measurement of Radiated Noise of Underwater Vehicles

Abstract

The invention provides a circular reverberation pool used for measuring radiation noise of an underwater vehicle. It includes a reverberation pool, and also includes a water circulation system composed of pipelines and water pumps. The reverberation pool is composed of two parts: a working section and a measuring section. The water inlet and outlet of the water circulation system are set in the working section, and the water inlet and outlet The diversion device is installed at the water inlet, the model installation platform is located in the center of the working section, and a flow stabilization device is installed between the water inlet diversion device and the model installation platform. The invention has the advantages of low background noise of the pool, division of the measurement section and the working section, can provide a stable and uniform accompanying flow field for underwater vehicles, is suitable for measuring hydrodynamic noise of various types of underwater vehicles, and is applicable to underwater reverberation methods, etc. It is a professional invented equipment for measuring the radiated noise of underwater vehicles.

Description

technical field [0001] The invention relates to a reverberation pool, in particular to a circular reverberation pool. Specifically, it is a circular reverberation pool for the measurement of radiated noise of underwater vehicles. Background technique [0002] The noise evaluation of underwater vehicles is an important research direction in the field of underwater acoustics, and it is also one of the problems that has not been effectively solved. A reasonable evaluation of the noise performance of underwater vehicles depends on accurate measurement of the radiated noise of underwater vehicles. At present, there are two main schemes to study the noise performance of underwater vehicles: 1. Measure the radiated noise of underwater vehicles under actual working conditions in oceans or lakes; 2. Measure underwater vehicles in circulating tanks or pools Radiation noise in the simulated state of the model. The sea test and other field tests in the first plan have unfavorable fac...

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Problems solved by technology

The sea test and other field tests in the first plan have unfavorable factors such as high test cost and complex sound field in the natural environment, and very accurate measurement results cannot be obtained; there are several unresolved problems in the second plan: (1) the existing The size of the working section of the water cylinder (including circulation type and gravity type) and the circulation tank is limited, and it is often designed for the hydrodynamic test research of the scale model of the underwater vehicle. (2) The working sections of the existing water tanks and circulating water tanks neither meet the conditions for underwater free-field measurements nor the conditions for underwater reverberation field measurements, even if the scale of the same underwater vehicle Under the same wake field conditions, the noise measurement results of the above-mentioned different facilities are still quite different; (3) The underwater vehicle scaled model test carried out in the circulating tank, according to the requirements of the hydrodynamic test, only Considering part of the fluid similarity criterion, the measured radiation noise, compared with the actual measurement results of the entity after calculating the scale effect, is often only similar in some frequency bands, which is not enough to evaluate underwater navigation. (4) Existing anechoic pools or reverberation pools cannot simulate the flow field environment under the working state of underwater vehicles, and the noise measurement results of underwater vehicles in these pools are different from those under the actual working conditions. The relationship between the radiated noise of the

[0004] Search found: Invention patents related to circulating water tanks are mainly applicable to various fluid tests, such as the small closed horizontal circulating water tank device with patent number CN202720106U. A closed water circulation tank composed of various sections is designed to observe the flow field and The test model is suitable for basic tests of fluid mechanics, etc., and cannot be used to measure the radiation noise of the test model in the flow field; the combined water tank shear flow guide device with patent number CNIO5761596A can be placed in different water tanks to meet different experimental requirements The shear flow is suitable for carrying out experimental research on wave-current interaction, but it cannot be used for acoustic measurement research; the patent No. CN206311301U is a horizontal circulating water tank with diversion and rectification devices, which solves the influence of lateral circulation in annular water tanks Due to the problem of test accuracy, open water tests of propellers and maneuverability studies of simple geometric objects such as underwater vehicles can be carried out, but they cannot be used to evaluate the noise performance of underwater vehicles, etc.

[0005] Invention patent for measuring flow noise using the reverberation method, patent number CN205209631U A diversion device for measuring underwater jet noise by the reverberation method. When measuring jet noise in the reverberation tank, the height of the water surface can be controlled to remain unchanged. However, this device cannot provide a stable and uniform wake field for underwater vehicles, nor is it suitable for measuring the radiated noise of underwater vehicles.

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