Measuring method of flow speed at nozzle of water-jet propulsor in sailing
A technology of water jet propulsion and measurement method, which is applied in the direction of fluid velocity measurement, velocity/acceleration/impact measurement, measuring device, etc., and can solve the problem of effective measurement of flow velocity of water jet propulsion nozzle, large vibration of nozzle water flow velocity, and measurement results Deviation and other problems, to achieve the effect of solving electrode surface polarization and calcification, improving reliability, and clear steps
Inactive Publication Date: 2014-05-28
COMP APPL TECH INST OF CHINA NORTH IND GRP
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Problems solved by technology
In actual sailing conditions, the sprayed water of the waterjet usually contains gas, and the sprayed water velocity of the nozzle is also very large, and the vibration is also very strong. Due to the limitation of these conditions, there is currently no control on the nozzle flow rate of the waterjet during sailing ( That is, the method of effectively measuring the water jet flow rate of the nozzle), the measurement results have a large deviation, therefore, it is necessary to find a method that can effectively measure the flow rate of the water jet propulsion nozzle during navigation
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[0035] When carrying out the measurement method of the nozzle flow velocity 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.
[0036] 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 pr...
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Abstract
The invention discloses a measuring method of a flow speed at a nozzle of a water-jet propulsor in sailing. A dynamic pressure sensor and a gas content senor are installed on a platform where the water-jet propulsor is arranged. A sailing speed measuring instrument is fixed on the platform and the measuring method comprises towing post steps for confirming dynamic pressure large coefficients, drag steps for confirming influence of platform movement coefficients and sailing measurement steps for confirming the flow speed at the nozzle of the water-jet propulsor in sailing. The towing post steps are used for confirming the dynamic pressure large coefficients, the drag steps are used for confirming the influence of platform movement coefficients and the sailing measurement steps are used for confirming the flow speed at the nozzle. The measuring method of the flow speed at the nozzle of the water-jet propulsor in sailing can accurately measure the flow speed at the nozzle of the water-jet propulsor in sailing and is explicit in principle, clear in steps, quite explicit in measuring methods of all measured values and easy to achieve.
Description
technical field [0001] The invention relates to the field of water flow velocity measurement, and in particular relates to a method for measuring the flow velocity of a nozzle 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 flow rate is an important index to measure the working performance of the water jet propulsion unit. In actual sailing conditions, the sprayed water of the waterjet usually contains gas, and the sprayed water velocity of the nozzle is also very large, and the vibration is also very strong. Due to the limitation of these conditions, there is currently no control on the nozzle flow rate of the waterjet during sailing ( That is, the method of effectively measuring the water jet flow rate of the nozzle), the measurement results have a large deviation, therefore, it is necessary to find a method that can effectively measure the flow rate of t...
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IPC IPC(8): G01P5/00G01N27/08
Inventor 王晋华钱毅刘培志查长流刘珊周宏志徐英新刘新广张敏瞿蓉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