Unlock instant, AI-driven research and patent intelligence for your innovation.

Shutter mechanism and method for simulating horizontal shear airflow in conventional wind tunnel

A horizontal shear and airflow technology, applied in aerodynamic tests, machine/structural component testing, measuring devices, etc., can solve the problems that conventional wind tunnels cannot directly generate shear airflow

Active Publication Date: 2017-01-25
CENT SOUTH UNIV +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a shutter-type mechanism for simulating horizontal shear airflow in a conventional wind tunnel and a method for simulating horizontal shear airflow in a conventional wind tunnel to solve the problem that conventional wind tunnels cannot directly generate shear airflow. The method is to install a shutter-type mechanism that can automatically rise and fall and has an opening at a certain distance upstream of the model, and realize the horizontal shear of the airflow at the test model through the sudden rise and fall of the mechanism. This method can easily adjust the airflow when shearing The duration and magnitude range of velocity changes to accurately simulate the various characteristics of shear flow

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Shutter mechanism and method for simulating horizontal shear airflow in conventional wind tunnel
  • Shutter mechanism and method for simulating horizontal shear airflow in conventional wind tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The steps of the shear flow generation method in the conventional wind tunnel are:

[0044] refer to figure 1 , the shutter type mechanism of the present invention is installed on the upstream of the test model, and the windward side of the shutter type mechanism is uniformly arranged with ventilation holes 4, the ventilation holes 4 can be rectangular or circular, and the ventilation rate is adjusted by changing the size and quantity of the ventilation holes 4. The windward plate body 2 is fixed on the ground through the fixed bracket 1 , the lower end of the shutter mechanism is fixed to the ground, and the shutter mechanism is connected to the windward plate body 2 through the rotating shaft 502 . The shutter-type mechanism is a plate-shaped structure, and different wind speeds can be achieved by changing different ventilation rates; the rotation of the shutter-type mechanism is realized by controlling the rotation of the rotating shaft 502 by a motor (power source 5...

Embodiment 2

[0046] A method of shear flow generation in a conventional wind tunnel, such as figure 1 As shown, taking the high-speed railway bridge 2 and the train as an example, a shutter mechanism is installed upstream of the model, and the ventilation holes 4 are evenly arranged on the windward side of the shutter mechanism. The ventilation holes 4 can be rectangular or circular. By changing the size of the ventilation holes 4 and the quantity to adjust the ventilation rate; the height of the shutter mechanism cannot be lower than the sum of the heights of the train model, bridge model and pier model; the windward plate body 2 is fixed on the ground, and the lower end of the shutter mechanism is fixed to the ground, and the shutter mechanism passes 502 is connected with the windward plate body 2 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a shutter type mechanism for generating horizontal shear airflow in a conventional wind tunnel in a simulation mode and a method. The shutter type mechanism for generating the horizontal shear airflow in the conventional wind tunnel in the simulation mode comprises a fixed support fixedly connected to the ground and a windward plate body which is installed on the fixed support in the vertical direction and used for converting horizontal airflow into the horizontal shear airflow, the windward plate body is arranged on the windward face of a high-speed railway bridge and provided with a plurality of ventilating holes used for ventilation, and a driving mechanism is arranged on the side of the windward plate body and used for driving the windward plate body to move in the vertical direction and controlling the moving speed of the windward plate body. The horizontal shear airflow different in flow rate is achieved, and therefore the simulation requirements under various conditions are met.

Description

technical field [0001] The present invention relates to the technical field of simulation of shear air flow in conventional wind tunnels, in particular to a shutter mechanism for simulating and generating horizontal shear air flow in conventional wind tunnels; A method of horizontally shearing airflow. Background technique [0002] Shear airflow refers to an airflow phenomenon in which the speed or direction of airflow changes suddenly, and can be divided into three main types: vertical shear of horizontal wind, horizontal shear of horizontal wind, and vertical wind shear. The train is mainly affected by the horizontal shear airflow, which is one of the main causes of wind-induced overturning of the train. For example, the investigation into the cause of the train overturning accident in southern Xinjiang in 2007 showed that the sudden shear of the airflow played an important role; The Nemuro Line accident, the Sanriku Railway accident, and the Chikuhi Line accident in 199...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/04
Inventor 邹云峰何旭辉李欢史康周佳
Owner CENT SOUTH UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com