期刊
JOURNAL OF THERMAL SPRAY TECHNOLOGY
卷 11, 期 4, 页码 496-507出版社
ASM INTERNATIONAL
DOI: 10.1361/105996302770348628
关键词
cold spray; numerical modeling; shock-particle interaction; supersonic flow
The classic one-dimensional isentropic flow approach is used along with a two-dimensional axisymmetric numerical model to show that the exit Mach number of a cold spray nozzle should be limited due to two factors. To show this, the two-dimensional model is validated with experimental data. Although both models show that the stagnation temperature is an important limiting factor, the one-dimensional approach fails to show how important the shock-particle interactions are at limiting the nozzle Mach number. It is concluded that for an air nozzle spraying solid powder particles, the nozzle Mach number should be set between 1.5 and 3 to limit the negative effects of the high stagnation temperature and of the shock-particle interactions.
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