FIELD: mechanical engineering. SUBSTANCE: compressed air goes to working nozzle 6 made as Laval's nozzle where it is mixed with abrasive incoming in nozzle 11 whose outlet section is located in narrowing part of Laval's nozzle 6, in zone of its precritical section. In this case compact flow of abrasive particles is formed. EFFECT: reduced possibility of displacement of abrasive particles to nozzle walls and their mutual contact, enhanced reliability of abrasive-jet apparatus. 1 dwg
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