Evaluation device and method for complex flow regime and heat transfer effect of swirling impinging jet

Abstract

The invention provides an evaluation device and a method for the complex flow regime and heat transfer effect of a swirling impinging jet. The top crossbeam part of an experiment table is provided with a three-degree-of-freedom mechanical arm. The upper middle part of the experiment table is provided with a gas collection chamber. The bottom of the gas collection chamber is connected with a stable straight pipe section via a flange to be provided with a swirling jet nozzle. The lower part of the swirling jet nozzle is provided with an insulation can. An air flow, provided by a gas source pump (or a blower fan), passes through a dust removal filter to flow into the steady-flow gas collection chamber, and then is sprayed out of the swirling jet nozzle after passing through the steady-flow straight pipe section so as to directly impinge a metal target surface heated at the lower part of the nozzle. Inside a test instrument, a three-dimensional particle imaging tachometer and a hot-wire anemometer are arranged to measure the complex flow state and the flow parameter thereof in a swirling impinging jet space. Meanwhile, a hot-fluid density instrument, a thermal infrared imager and a temperature sensor are arranged to test the impinging heat-transfer effect of the target surface. According to the technical scheme of the invention, the device is simple in structure. The device and the method provide a feasible experiment device and an evaluation method for the research on the impinging complex flow of a swirling jet and the heat-transfer characteristic rule.

Description

technical field [0001] The present invention relates to the technical field of studying the flow state and heat transfer phenomenon of the rotating impinging jet, in particular to an evaluation device and method related to the complex flow state and heat transfer effect of the rotating impinging jet, in particular to an underdeveloped and fully developed rotating impinging jet The basic experimental research on the scientific issue of jet flow state and heat transfer characteristics can be applied to the structural design of the impingement uniform cooling unit of the steam turbine blade, the nozzle structure design of the burner, the uniform and efficient cooling of electronic components, and the large area of ​​high-temperature plates. Experimental research in the field of homogenized cooling, as well as a general teaching and research tool for understanding the complex flow regime and heat transfer phenomena of rotating jets. Background technique [0002] Among the existi...

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the shortcomings of the existing impingement jet experimental device, which has a small amount of measurement data and low accuracy; at the same time, to expand and realize the study of complex rotating impinging jet flow and heat transfer phenomena, the purpose of the present invention is to provide a complex flow state of rotating impinging jet and Apparatus and method for evaluating heat exchange effect, characterized by high accuracy

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