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Fan Minghao
Zhou Hua
Yang Huayong
State Key Laboratory of Fluid Power Transmission and Control,
Zhejiang University,
Hangzhou 310027, China |
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SPRAY
ATOMIZATION OF HIGH
PRESSURE NOZZLE*
Abstract: Shape selection and dimension design of direct jet spray nozzle are done. Relationship between system pressure p, nozzle inner structure dimension and outer atomization characteristics are analyzed. Simulation results show that the nozzle outlet diameter and system pressure are the crucial two factors for spray atomization. When system flow rate qv is 16 mL/r and system pressure p is 14 MPa, the optimal outlet diameter is about 1.5 mm, Trifle fluctuation of outlet diameter may cause great affection to water droplets’ sauter mean diameter (SMD)D32, and 8~9 MPa is the baseline of stable atomization pressure. Simulation results are experimentally verified. Besides, nozzle cylinder length l/d = 2 and pinch angle a = 30˚~60˚ is the best structure to this type of nozzle, jet distance is about 9 m in this condition.
Key words:
Spray nozzle Atomization quality System pressure Inner dimension parameters |