Gravity circulating water tunnel for underwater complex surface anti-drag measurement

A complex surface, gravity-based technology, applied in the direction of measuring devices, fluid dynamics tests, machine/structural component testing, etc., can solve the problem of affecting the results of complex surface resistance measurements, and cannot meet the requirements of complex surface resistance tests and flow uniformity High-level problems, to achieve the effect of small footprint, precise control of flow rate, and flexible deployment

Pending Publication Date: 2018-11-16
PEKING UNIV
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Problems solved by technology

[0004] However, the resistance measurement of underwater complex surfaces requires high flow uniformity, because once disturbed by the vibration of the power device, the results of complex surface resistance measurement will be greatly affected
At the same time, limited by the height of the

Method used

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  • Gravity circulating water tunnel for underwater complex surface anti-drag measurement
  • Gravity circulating water tunnel for underwater complex surface anti-drag measurement
  • Gravity circulating water tunnel for underwater complex surface anti-drag measurement

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Embodiment Construction

[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0061] In an exemplary embodiment of the present invention, a gravity-type circulating water tunnel for drag reduction measurement of complex underwater surfaces is provided. figure 1 It is a front view of the overall structure of the gravity-type circulating water tunnel for underwater complex surface drag reduction measurement of the present invention. figure 2 It is a top view of the overall structure of the gravity-type circulating water tunnel used for underwater complex surface drag reduction measurement of the present invention. image 3 yes figure 1 Schematic diagram of the middle rectifier section. Figure 4 yes figure 1 Schematic diagram of the middle and high water tank structure. Such as Figure 1-Figure...

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Abstract

The invention provides a gravity circulating water tunnel for underwater complex surface anti-drag measurement. The gravity circulating water tunnel comprises a power system. The power system comprises a high water tank provided with a water outlet, used as a water source of the gravity circulating water tunnel, and outputting water from the water outlet; a liquid level measuring device used for measuring a liquid level in the high water tank in real time, and outputting a measured liquid level signal; a liquid level control system connected with the liquid level measuring device and used foradjusting the liquid level in the high water tank according to the measured liquid level signal to keep the liquid level constant; a flow rate adjusting device arranged on a water flow path behind thewater outlet of the high water tank and used for controlling a flow rate in order to make the flow rate reach a set value. The gravity circulating water tunnel can realize a variable speed in a widerange under a limited experimental space, can improve the uniformity of a flow field, can accurately control the flow rate at a centimeter level, and can be used for the accurate measurement of underwater complex surface drag.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics experiments, in particular to a gravity-type circulating water tunnel used for drag reduction measurement of complex underwater surfaces. Background technique [0002] As we all know, water tunnel, as an experimental device for flow display and fluid measurement, can be used to study hydrodynamic phenomena such as boundary layer, laminar flow, turbulent flow, cavitation, flow around a cylinder, and hydroelasticity, as well as the performance of underwater vehicles. resistance measurement. In order to ensure the accuracy of the water tunnel during the measurement process, it is necessary to carry out structural optimization design, hydrodynamic design and power system design for the water tunnel. [0003] At present, the main components of circulating water tunnels at home and abroad are roughly the same, mainly including rectification section, contraction section, working section, diffusi...

Claims

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Application Information

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IPC IPC(8): G01M10/00
CPCG01M10/00
Inventor 李宏源吕鹏宇段慧玲相耀磊袁辉靖杜增智黄晟林李泽祥王祥宇
Owner PEKING UNIV
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