Determining the mean size and density of clusters, formed in super sonic jets, by Rayleigh scattering and Mach-Zehnder interferometer
| Autor: | Nandan Jha, Jayant K. Fuloria, D. R. Mishra, Paramita Deb, Kailash C. Gupta |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 118:114308 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.4931374 |
| Popis: | In this work, the formation of clusters in a supersonic jet expansion has been investigated. Clusters of argon, carbon-dioxide, nitrogen, and oxygen have been generated in the gas jet with three different types of nozzles (0.5 mm diameter, 0.8 mm diameter, and a conical nozzle with 0.8 mm diameter aperture). The mean size and density of the clusters have been measured as a function of backing pressure. Here, density of clusters refers to the density of the cluster collection. Rayleigh scattering experimental data and Mach-Zehnder interferometer data have been combined to estimate the average size and density of clusters. CO2 and Ar clusters form easily at about a backing pressure of 2 bars, while N2 and O2 clusters do not form easily. N2 and O2 begin to cluster at a backing pressure of about 18–24 bars. The mean cluster radius of Ar varies from 6.6 A to 24 A and the cluster radius of CO2 varies from about 8.8 A to 35 A as the backing pressure increases from 3 bars to 14 bars. In the same range of backing ... |
| Databáze: | OpenAIRE |
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