Multi-frequency pulse jet generator

Abstract

The invention provides a multi-frequency pulse jet generator. An air source module for providing airflow for a system, a valve control module for adjusting the air flow, a flow measuring module for detecting the air flow, and a pulse electromagnetic valve for emitting the airflow are sequentially arranged along an air flow path, the pulse electromagnetic valve is in communication connection with asignal generating module capable of generating pulse signals at different frequencies and controlling the pulse electromagnetic valve to be switched on and off. The multi-frequency pulse jet generator has the beneficial effects that the signal generating module is used in cooperation with the pulse electromagnetic valve, pulse jet at different frequencies can be provided by changing the frequencies of the pulse signals generated by the signal generating module, and the multi-frequency pulse jet generator is simple in structure and convenient to use; and the whole system is stable in operation, low in noise and suitable for use and popularization, and frequency adjustment is convenient.

Description

technical field [0001] The invention relates to the technical field of energy power equipment, in particular to a multi-frequency pulse jet generator. Background technique [0002] Jet impingement is an effective method to enhance local heat transfer or mass transfer. Because it directly impacts the cooled or heated wall, it can form a very thin boundary layer on the wall, so that the directly impacted area has a strong impact. Heat and mass transfer effects. At present, the impingement jet has been widely used in many engineering fields, such as drying of textiles and paper, tempering of glass, cooling and heating of steel, deicing of aircraft wings, cooling of turbine blades of aeroengines, and cooling of electronic components. cooling etc. The research on the enhanced heat transfer of impinging jet is of great significance to the energy-saving operation of these industrial processes, so people have carried out extensive research on impinging jet in the past decades. ...

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Problems solved by technology

[0004] Chinese patent application CN106040476A discloses an active control device for an oscillating jet. By adding an excitation unit to the oscillating jet device, a wide range of macroscopic control of the frequency of the self-excited oscillating jet is realized. However, due to the internal The complexity of the flow field and its ejection jet are affected by many factors, and it is difficult to make a unified evaluation of the jet performance under different parameters. Therefore, the relationship between the thermal effect and the pulse frequency is mainly studied for the non-self-excited oscillation pulse jet. The existing technology Most of the pulse signal generation systems in China directly use foreign equipment and instruments, which require high costs, and the system is relatively complicated. The design of a simple and easy-to-control intelligent pulse jet generation device has not yet begun.

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