Test system of propulsive water-jet pump based on echoic environment and test method thereof

Abstract

The invention discloses a test system of a propulsive water-jet pump based on echoic environment and a test method thereof, and the test system mainly takes a closed cycle system (for short, closed cycle system) of a comprehensive performance test bed of the propulsive water-jet pump as an infrastructure, wherein the test system comprises a vector transducer, a mechanical scanning system, an echoic tank, a data acquisition and analysis system and a propulsive water-jet pump model; the partial closed cycle system pipeline containing the propulsive water-jet pump and the mechanical scanning system are arranged in the echoic tank, the measured propulsive water-jet pump is encircled by using a measurement surface, discrete points from a vertical measurement surface sound field are sampled by combining the mechanical scanning system, and underwater radiation noise of the propulsive water-jet pump is measured by a sound intensity method. In the method, the influence of external interference noise source can be ignored in theory, in practical engineering application, the signal to noise ratio of the engineering test can be ensured to benefit for field measurement and sound power measurement of complex oscillating bodies in finite space, especially.

Description

technical field [0001] The invention belongs to the technical field of ship propulsion, and in particular relates to a water jet propulsion pump noise test system and a test method thereof based on a non-nechoic environment. Background technique [0002] Using the closed circulation system of the water jet propulsion pump comprehensive performance test bench to measure the hydrodynamic performance of the water jet propulsion pump is a relatively common test method, and this method is also very mature, while measuring the underwater radiation noise of the water jet propulsion pump in operation Performance, there are two commonly used methods at present: 1. Measure with the help of a cavitation water tank with an anechoic water tank. The anechoic water tank is usually located below the working section of the cavitation water tank. The underwater radiation noise of the water propulsion pump is directly measured; 2. A small non-anechoic water tank is installed outside the plexig...

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Problems solved by technology

[0003] In order to solve the above-mentioned problems, the present invention provides a water jet propulsion pump noise testing system and its testing method based on a non-noise-abnegating environment, which effectively solves the immature technology of cavitation water cylinder to measure water jet propulsion pump noise and poor test economy , The defect that the flow measurement is difficult

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