Road tunnel ventilation performance model testing system

A tunnel ventilation and tunnel model technology, which is applied in the field of model testing, can solve the problems of inability to effectively analyze the influence of traffic wind, slow driving speed, and test error of wind speed increase, so as to ensure multi-function and test accuracy, strong development versatility, The effect of improving reliability

Inactive Publication Date: 2013-07-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, there are two main problems in the current road tunnel ventilation test system: one is poor versatility and single function, and cannot test the air flow characteristics under the coupling effect of traffic wind and jet wind; the other is that even if there are cars in the tunnel, there are The driving speed is slow, and the traffic wind formed is too small, which may prevent the air flow in the tunnel from entering the self-modeling area; and the wind speed is too low to increase the test error, and the influence of traffic wind cannot be effectively analyzed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0047] Example 1: Test the influence of traffic wind generated by vehicle movement on the ventilation characteristics in the tunnel and at the top opening

[0048] Specific steps are as follows:

[0049] 1) Assemble the tunnel model according to the test needs, and place the model cars at different positions on the circular track of the power supply guide rail model at a certain interval;

[0050] 2) Arrange pressure sensors at the top opening to be tested and in the tunnel model;

[0051] 3) Inject tracer particles for traffic wind test into the tunnel model;

[0052] 4) Turn on the track power supply, and the model car starts to drive;

[0053] 5) Turn on the multi-point pressure acquisition system and the Doppler velocimeter;

[0054] 6) After the traffic wind formed by the running of the car is stable, record the data;

[0055] 7) Analyze the law of pressure and velocity changes in different sections.

example 2

[0056] Example 2: Test the influence of different top opening forms on the natural ventilation characteristics under the coupling effect of traffic wind and jet wind

[0057] Specific steps are as follows:

[0058] 1) Assemble the tunnel model according to the test needs, connect the top opening of the set form, the form of the top opening can be Figure 4-1 to Figure 4-3 Any one or several of them, the top opening can also be used Figure 4-1 to Figure 4-3 other structural forms;

[0059] 2) According to the test needs, place the model cars at different positions on the circular track of the power supply guide rail model at a certain interval;

[0060] 3) Arrange pressure sensors at the top opening to be tested and in the tunnel model;

[0061] 4) Inject tracer particles for traffic wind test into the tunnel model;

[0062] 5) Turn on the jet air circulation device;

[0063] 6) Turn on the track power supply, and the model car starts to drive;

[0064] 7) Turn on the mu...

example 3

[0067] Example 3: Test the influence of jet fan position on natural ventilation characteristics under the coupling effect of traffic wind and jet fan

[0068] Specific steps are as follows:

[0069] 1) Assemble the tunnel model according to the test needs, and place the model cars at different positions on the circular track of the power supply guide rail model at a certain interval;

[0070] 2) Arrange pressure sensors at the top opening to be tested and in the tunnel model;

[0071] 3) Inject tracer particles for traffic wind test into the tunnel model;

[0072] 4) Turn on the jet fan at the designated position;

[0073] 5) Turn on the track power supply, and the model car starts to drive;

[0074] 6) Turn on the multi-point pressure acquisition system and the Doppler velocimeter;

[0075] 7) After the traffic wind formed by the running of the car is stable, record the data;

[0076] 8) Analyze the influence of the relative position of the top opening and the jet fan on...

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Abstract

The invention discloses a road tunnel ventilation performance model testing system. The road tunnel ventilation performance model testing system comprises a tunnel model, a traffic wind simulation system, a jet flow wind simulation system and a data test system. The traffic wind simulation system comprises a simulation dynamic model car and a car operation control system. The car operation control system comprises an annular guide rail model and a voltage controlled power source. The annular guide rail model is provided with two opposite straight line road sections and two opposite arc road sections, and road faces of the two arc road sections are inclined faces with lower inner sides and high outer sides. The voltage controlled power source comprises two groups, one group supplies power to the straight line road sections, in a tunnel, of the annular guide rail model, and the other group supplies power to the straight line road sections, paved outside the tunnel, of the annular guide rail model. The simulation dynamic model car operates on the annular guide rail model and gets power from the guide rail when passing through the two opposite straight line road sections. The road tunnel ventilation performance model testing system can form traffic wind which is stable and capable of guaranteeing that air flow can enter a self-model area, and has the advantages of being multifunctional and strong in development generality.

Description

technical field [0001] The invention relates to a model test technology, in particular to a road tunnel ventilation performance model test system. Background technique [0002] The road tunnel ventilation performance model test system is an important means to study the aerodynamic problems in the road tunnel. It can qualitatively or quantitatively analyze the air flow characteristics in the tunnel, at the opening and at the vent. Considering the instability of natural wind, the air flow characteristics of road tunnels are studied by using model tests, mainly considering the influence of traffic wind formed by vehicle movement and fan boost pressure. [0003] According to the requirements of the traffic wind test, the construction of the model tunnel needs to meet the Reynolds model law (Re), combined with the Strouhal number (Sr) to convert the flow field from the model space to the prototype space. After the model tunnel is scaled down, the tunnel wind speed required to me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/08
Inventor 凌继红邢金城贺鹏举马海涛张本利
Owner TIANJIN UNIV
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