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Method for measuring vertical flow velocity distribution, surface flow velocity and average flow velocity of dilute debris flow

A measurement method and flow velocity distribution technology, which are used in the vertical flow velocity distribution of dilute debris flow, the measurement of three velocity quantities of surface flow velocity, the measurement technology of moving multiphase fluids, and the field of average flow velocity, which can solve the high performance requirements of hardware graphics and image processing. , inapplicability, etc.

Pending Publication Date: 2020-12-18
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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Problems solved by technology

This method uses particle image velocimetry (PIV) to study the characteristics of particles and hydraulic gradient on the vertical velocity of dilute debris flow. It requires a complete set of hardware equipment, and has high requirements for hardware graphics and image processing performance, so it can only be tested in the field. Adopted in the research, it cannot be applied under the relatively simple working conditions in the field of debris flow monitoring and prevention

Method used

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  • Method for measuring vertical flow velocity distribution, surface flow velocity and average flow velocity of dilute debris flow
  • Method for measuring vertical flow velocity distribution, surface flow velocity and average flow velocity of dilute debris flow
  • Method for measuring vertical flow velocity distribution, surface flow velocity and average flow velocity of dilute debris flow

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Embodiment 1

[0088] Such as Figure 1 ~ Figure 3 As shown, the flow velocity of a dilute debris flow is measured by the method of the present invention.

[0089] On July 28, 2019, a debris flow ditch in the Dadu River Basin in Sichuan Province formed a debris flow under the stimulation of heavy rain, posing a great threat to downstream farmland and other facilities. The measured debris flow density range of the field is 1300kg / m 3 ~1800kg / m 3 , belongs to dilute debris flow, and is applicable to the method of the present invention.

[0090] figure 1 It is a schematic diagram of the flow rate measurement technology of dilute debris flow.

[0091] Step S1, setting up the measurement section

[0092] According to the topography of the debris flow channel and downstream safety requirements, determine the measurement position and set up the measurement section on the channel. On-site investigation (the on-site investigation includes various surveying and mapping, measurement, and simulati...

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Abstract

The invention discloses a method for measuring vertical flow velocity distribution, surface flow velocity and average flow velocity of dilute debris flow. Aiming at the defect that a method for measuring vertical flow velocity distribution of diluted debris flow in the prior art is not suitable for relatively simple and crude working conditions in the field of debris flow monitoring and prevention, the invention provides a method for measuring vertical flow velocity distribution of diluted debris flow. The method is a measurement method based on a solid-liquid two-phase force balance equationon the premise of considering the solid-liquid two-phase interphase dragging effect. The invention provides a specific calculation model of the measurement method after optimization. The invention also provides a method for measuring the surface flow velocity and average flow velocity of diluted debris flow. The measurement method is scientific and reasonable, the calculation amount is small, andall needed basic data can be obtained by means of traditional debris flow monitoring test equipment. The method can meet the requirement of diluted debris flow velocity measurement under the actual condition of debris flow disaster monitoring and control technology, and provides convenient basic technical support for disaster prevention and reduction.

Description

technical field [0001] The invention relates to a measurement method, in particular to a measurement method for the distribution of vertical flow velocity, average flow velocity and surface flow velocity of dilute debris flow, and belongs to the technical fields of moving multiphase fluid measurement technology and mountain disaster monitoring and prevention. Background technique [0002] In the technical field of debris flow monitoring and prevention, the movement velocity of debris flow is one of the most important parameters. A variety of flow velocity indicators (such as average velocity, surface velocity, velocity distribution, etc.) are not only important indicators for the study of debris flow characteristics, but also for the design of various debris flow prevention and control engineering structures. [0003] Debris flow is generally regarded as a special solid-liquid two-phase fluid, in which the liquid phase is a liquid phase slurry composed of fine particles and ...

Claims

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Application Information

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IPC IPC(8): G06F17/13G06F17/12G06F17/11G01P5/00
CPCG06F17/13G06F17/12G06F17/11G01P5/00Y02E30/30
Inventor 唐金波陈晓清胡凯衡陈华勇陈剑刚赵万玉
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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