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Experiment device and method for evaluating synthetic jet plate turbulent flow drag reduction

A technology of synthetic jet and drag reduction device, which is applied in the field of aerospace to achieve the effect of simple operation

Pending Publication Date: 2018-03-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
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Problems solved by technology

Based on this situation, more stringent regulatory measures are likely to appear in the next few years, and designing environmentally friendly aircraft has become a major challenge for aircraft manufacturers

Method used

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  • Experiment device and method for evaluating synthetic jet plate turbulent flow drag reduction
  • Experiment device and method for evaluating synthetic jet plate turbulent flow drag reduction
  • Experiment device and method for evaluating synthetic jet plate turbulent flow drag reduction

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Such as figure 1 As shown, the experiment was carried out in a low-turbulence silent wind tunnel. The experimental section was 1.2mX1.2m (WXH), and the length was 3.5m (L). There were windows on both sides and the top for optical instruments. The wind speed was set to 15m / s, along the negative x direction.

[0028] Such as figure 2 , 3 As shown, the zero pressure gradient plate 1 is built, which is composed of three 1mX0.8mX1cm acrylic horizontal plates 10, 2, 3 spliced ​​by the fixed bracket 9, and the tail plate 4 is a 1mX0.2m acrylic plate relying on the fixed bracket and telescopic adjustment The rod is fixed, and the adjusting rod can be stretched and retracted as required, so as to adjust the angle of the tail plate. There is a side pressure hole 5 on the plate, which is connected to the rubber tube of the pressure measuring valve. The pressure measuring valve is placed outside the wind tunnel, and is connected to the plate by the rubber tube through the openi...

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Abstract

The invention discloses an experiment device and method for evaluating synthetic jet plate turbulent flow drag reduction. The device comprises a low turbulent flow static wind tunnel, a test platform,a force test balance, a smoke generator an LDV laser velocity measurement device, a synthetic jet plate turbulent flow drag reduction device, wherein the test platform is fixedly arranged in an experiment segment of the low turbulent flow static wind tunnel, and the test platform comprises a fixing support, a zero pressure gradient flat plate and a guide rail. The method is characterized in thatfirstly, the flat plate with zero pressure gradient is established in the wind tunnel, flow field distribution of the flat plate having no excitation device is detected, secondly, the excitation device is added to the flat plate, flow field distribution is detected when the excitation device is in a non-open state, and lastly, the excitation device is opened, flow field distribution is detected when the excitation device is in an open state. Friction resistances under different states are calculated through Spalding formula fitting, and the actual drag reduction effect of the synthetic jet plate turbulent flow drag reduction device is acquired through analysis. The method is simple for operation, and the method is suitable for measuring the drag reduction effect of various types of drag reduction devices.

Description

technical field [0001] The invention belongs to the field of aerospace, and relates to an experimental device and method for evaluating the drag reduction of a synthetic jet flat plate turbulent flow, so as to obtain the drag reduction effect of a synthetic jet actuator on a flat plate turbulent boundary layer. Background technique [0002] The influence of the environment on the development of modern engineering technology is increasing. Climate change has become a major driver of technological development, and the aviation industry is no exception. Based on this situation, more stringent regulatory measures are likely to appear in the next few years, and designing environmentally friendly aircraft has become a major challenge for aircraft manufacturers. Reducing emissions, especially of greenhouse gases such as carbon dioxide and nitrogen oxides, is a new paradigm for current aircraft design. However, reducing final emissions can only be achieved by reducing drag during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06G01M9/04
CPCG01M9/04G01M9/065
Inventor 郑耀邹建锋叶志贤楼韫闻童小康闾曾怡俞天纬陈烨斯张永兴
Owner ZHEJIANG UNIV
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