... statistical methods technological parameters of the ejection unit were analyzed. Results Experiments of the alternate design of improved flow channels of the ejector parts (a nozzle with three through bores, a nozzle with a retractable needle, the unit of the mixing chamber) were carried out, advantages and disadvantages, a field of application were identified. 1) A nozzle with a retractable needle allows to change quickly the flow area of the nozzle, but the installation of the needle is characterized by ...

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