Carriage window air-flow state tracking device and experimental method

Abstract

The invention relates to a carriage window air-flow state tracking device and experimental method. The method comprises the steps: a fan is turned on to circulate the air in a pipeline, a flue gas generator is turned on, the flue gas is released through a main pipe, a branch pipe, a flow regulating value, a buffer tube, a release tube and a releasing hole to carriage window, and the rotating speed of the fan is regulated to control the flow, so that the trace of the flue gas in the carriage is clearly visible; a camera shoots the released flue gas and saved the image to a computer, real-time flow state of the air in the carriage is directly displayed, and the wind direction at the window is judged; wind speed data collected by a wind-velocity indicator is recorded by a data collector and introduced into the computer, the entrance time and speed curves are drawn by the data collector, the ventilation volume at the carriage window is calculated hereby, so that the data is provided for wind field simulation and fire oxygen consumption calculation of following fire space, and the device and the method are important for fire state judgment in fire-fighting study.

Description

technical field [0001] The invention belongs to the technical field of air flow field testing, and in particular relates to an air flow state tracing device and an experimental method at the window of a carriage, mainly used for measuring the air flow state at the window and the air flow state inside the locomotive when the diesel locomotive is running. . Background technique [0002] In fire science research, it is often necessary to measure the air flow state at the window of the car, such as the measurement of the air flow state at the window when the diesel locomotive is running, the measurement of the air flow state inside the locomotive, etc. As one of the three elements of fire occurrence, air has a great influence on the development of fire, fire state, and the timing of fire fighting. It is the focus of analysis and testing in fire research. At present, the air volume measurement in the fire research in the compartment mostly relies on the method of arranging the a...

AI Technical Summary

Problems solved by technology

At present, the air volume measurement in the fire research in the compartment mostly relies on the method of arranging the anemometer at the designated position at the window. The point flow field is used instead of the flow field of the entire surface to estimate the air intake volume, and there are large calculation errors. First, During the test, it is impossible to determine the flow state at the window and inside the compartment, so the local backflow influence factors caused by air disturbance are often ignored

The second is that due to the real-time changes in the direction of the complex wind field of the moving car body, it is difficult to measure and measure these complex airflow states by relying on the existing anemometer

Third, after the anemometer is set, it can only measure the wind speed in the specified direction, but the air actually flowing at the window often has a certain angle with the window, and the test results of the anemometer cannot accurately describe the actual airflow state

In addition, the flow state of the air in the interior of the car cannot be known, let alone the influence of the wind field on the spread of the fire in the event of a fire.

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