Multi-parameter adjustable spray flow experimental system

Abstract

The invention relates to a multi-parameter adjustable spray flow experimental system which comprises an air source module, a flow control valve, a vortex flow meter, a water storage tank, a metering pump, a frequency converter, an atomizing and mixing section, a liquid film collection device, a light extinction granulometer and a throttling valve, wherein air provided by the air source module is fed into the atomizing and mixing section via the flow control valve, and the gas phase flow rate is metered by the vortex flow meter; water provided by the water storage tank is adjusted by the metering pump and the frequency converter and then atomized by a high-pressure nozzle so as to form micro-scale droplets to enter the atomizing and mixing section, the water flow is controlled by the metering pump, the metering pump is used for performing flow control by virtue of a combination of two manners such as frequency modulation and stroke adjustment, and the frequency is continuously adjustedby the frequency converter; and after forming the spray flow on the atomizing and mixing section, the gas phase and the liquid phase enter the liquid film collection device, and by virtue of control and measurement of gas displacement by the throttling valve, the particle size and concentration of droplets in the pipeline are measured by the light extinction granulometer via the liquid film collection device.

Description

technical field [0001] The invention belongs to the field of gas-liquid two-phase flow parameter measurement, and relates to a multi-parameter adjustable mist flow experimental system. Background technique [0002] Gas-liquid two-phase flow exists widely in modern industrial equipment. As an important flow pattern of gas-liquid two-phase flow, mist flow takes the gas phase as the continuous phase and the liquid phase as the discrete phase, and most or all of the liquid phase is entrained by the gas phase in the form of droplets. It is often used in fire extinguishers, various engine combustion chambers, and underwater propulsion devices. Its flow rate, dryness, pressure drop, and section holdup are of great significance to the safety, economy, and energy saving of industrial equipment [1]. [0003] Due to the importance of mist flow patterns in industrial production, people have carried out in-depth research on mist flow and its flow measurement. For the study of mist flow...

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Problems solved by technology

Strict conditions are required to form the mist flow in the ejector, and the droplets are prone to deposit along the way, which will affect the formation of the mist flow pattern

In addition, most mist flow experiments are carried out under normal pressure [5][6][8], ignoring the influence of pressure changes on flow measurement, resulting in poor adaptability of the correction model and unable to fundamentally solve the problem of flow correction

For the parameter adjustment of the mist flow pattern, due to the large number of influencing parameters and the mutual coupling between the various parameters, it is difficult to adjust and control the flow parameters.

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