A Mobile Supersonic Nozzle Continuous Measuring System

Abstract

The present invention is a mobile supersonic nozzle continuous measurement experiment system, including two parts: a mobile supersonic nozzle experimental device and a software closed-loop control system; the system can obtain a supersonic nozzle through the relative movement of a rectangular nozzle and a high-frequency response pressure sensor The pressure fluctuation characteristics of unsteady condensate flow overcomes the shortcomings of the traditional supersonic nozzle with poor consistency in pressure measurement along the way, and uses the extinction method to measure the droplet size distribution in the entire area of ​​the supersonic nozzle; the system is realized through the data acquisition program Multi-channel data acquisition, automatic storage, and over-limit alarm are provided, and continuous large-capacity dynamic data is stored through the establishment of a database; the system adopts motor pulse control with a control accuracy of 0.01mm, realizing the synchronization of data acquisition and motor control; The invention not only considers the continuous measurement of the experimental data of the supersonic nozzle, but also realizes the closed-loop control of the system software, which can be used for the experimental research of the coagulation characteristics of the supersonic nozzle.

Description

technical field [0001] The invention belongs to the field of gas-liquid two-phase flow measurement, and relates to a mobile supersonic nozzle continuous measurement system. Background technique [0002] Supersonic nozzle is the core component of supersonic equipment, and has been widely used in petroleum, natural gas, chemical industry, pharmaceutical, energy saving, environmental protection, aviation and aerospace and other fields [1] . Supersonic cyclone separation technology is a multi-component gas condensation separation method that combines cyclone separation technology and condensation separation technology [2] , the supersonic nozzle is the key component of the coagulation effect of the supersonic separator. The condensation effect is that when the saturated wet steam passes through the supersonic nozzle, it expands to the supersonic speed in the nozzle, producing low pressure and low temperature, so that the liquid phase condenses and nucleates [3] . The researc...

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Problems solved by technology

Since the traditional experimental device needs to drill a lot of pressure holes, which are not on the same level, it cannot fully explain the equivalence of the pressure data near the throat condensation. At the same time, the pressure sensors at different sections are of different models, and the consistency is relatively inconsistent. it is good

And because the size of the nozzles is small, the pressure holes cannot be set too many, so the pressure at a few pressure holes can only be measured, and the continuous measurement of the pressure along the nozzle cannot be achieved.

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