Measurement method of output power of sailing water-jet propulsor
A technology of water jet propulsion and measurement method, which is applied in power metering, measuring device, fluid velocity measurement and other directions, can solve the problems of effective measurement of water jet propulsion, large water flow velocity at nozzle, deviation of measurement results, etc. Surface polarization and calcification, clear principle, effect of improving reliability
Inactive Publication Date: 2014-06-18
COMP APPL TECH INST OF CHINA NORTH IND GRP
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Problems solved by technology
In actual sailing conditions, the water sprayed by the waterjet usually contains gas, and the flow rate of the sprayed water at the nozzle is also very large, and the vibration is also very strong. Due to the limitations of these conditions, there is currently no regulation on the output power of the waterjet in sailing. There is a large deviation in the measurement results, so it is necessary to find a method that can effectively measure the output power of the water jet propulsion in navigation
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[0037] When carrying out the measuring method of the output power of waterjet propeller in the voyage of the present invention, as Image 6 , 7 As shown in and 8, the dynamic pressure sensor 201 and the air content sensor 202 are installed on the platform 210 where the water jet propeller is located through the sensor installation base 203, so that the dynamic pressure sensor 201 and the air content sensor 202 are positioned at the nozzle of the water jet propulsion Directly in front of 209 is, for example, a position of 70 mm to 80 mm, where more effective measurement data can be obtained; the speed measuring instrument 207 is fixed on the platform 210 to measure the speed of the platform.
[0038] The measurement method of the present invention includes a pile dragging step for determining the dynamic pressure bias coefficient β, a dragging step for determining the platform motion influence coefficient ξ, and a nozzle flow velocity V for determining the waterjet propeller in...
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Abstract
The invention discloses a measurement method of an output power of a sailing water-jet propulsor. A dynamic pressure sensor and a gas content sensor are installed on a platform where a water-jet propulsor locates; a navigation speed measuring instrument is fixed on the platform. The measurement method comprises a pile dragging step used for confirming a relatively high dynamic pressure coefficient, a dragging step used for confirming the platform movement influence coefficient and a navigation testing step used for confirming the output power of the sailing water-jet propulsor, wherein the pile dragging step confirms the relatively higher coefficient of the dynamic pressure; the dragging step confirms the platform movement influence coefficient; and the navigation testing step confirms jet speed, flow and the output power of the water-jet propulsor. The measurement method provided by the invention can accurately measure the output power of the water-jet propulsor in sailing; the measurement method is definite in principle and clear in steps; the testing method of every measurement value is very clear and easy to implement.
Description
technical field [0001] The invention relates to the field of water flow measurement, and specifically relates to a method for measuring the output power of a water jet propeller during navigation. Background technique [0002] The water jet propeller is a kind of power device of the water motor platform, and the nozzle velocity, flow rate and output power of the water jet propulsion are an important index to measure the performance of the water jet propulsion. In actual sailing conditions, the water sprayed by the waterjet usually contains gas, and the flow rate of the sprayed water at the nozzle is also very large, and the vibration is also very strong. Due to the limitations of these conditions, there is currently no regulation on the output power of the waterjet in sailing. There is a large deviation in the measurement results, so it is necessary to find a method that can effectively measure the output power of the water jet propulsion in navigation. Contents of the inv...
Claims
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IPC IPC(8): G01L3/24G01P5/00G01N27/08
Inventor 查长流刘培志钱毅王晋华周宏志刘珊刘新广张敏瞿蓉徐英新胡雄文赵小川赵欣欣刘莹施建昌田铮崔倩楠张月李陈陈贤相左明于晶郝丽丽
Owner COMP APPL TECH INST OF CHINA NORTH IND GRP