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Droplet Agglomeration in Rocket Nozzles Caused by Particle Slip and Collision

Marble, Frank E. (1967) Droplet Agglomeration in Rocket Nozzles Caused by Particle Slip and Collision. Astronautica Acta, 13 (2). pp. 159-166. ISSN 0004-6205.

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Droplet Agglomeration in Rocket Nozzles Caused by Particle Slip and Collision. The development of the particle mass spectrum in a rocket nozzle is investigated under the assumption that droplet growth by collision and agglomeration is the dominant mechanism subsequent to initial appearance of particles in the rocket chamber. Collisions are calculated on the basis oflinearized particle slip theory and a spectral integral equation is derived describing the development of particle mass spectrum during the flow process along the nozzle. This agglomeration process continues until the droplet temperature falls below the freezing point of the material. A solution is obtained for the approximate growth in the average particle size during the expansion process. The results show that, according to this model, the particle size is strongly dependent on the initial pressure in the rocket chamber and is independent of nozzle geometry. These results suggest that the collision-agglomeration process is at least one of the critical factors that accounts for the size of solid particles in rocket exhausts.

Item Type:Article
Additional Information:© Pergamon Press. Received 14 June 1966. Subsequent to submitting the present paper, a numerical calculation of agglomeration in rocket nozzles was presented by CROWE, C. T. and WILLOUGHBY, P. G., A mechanism for particle growth in a rocket nozzle, AIAA J14, 1677-78 (1966).
Group:Guggenheim Jet Propulsion Center
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Guggenheim Jet Propulsion CenterUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20101222-073250075
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21492
Deposited By: Ruth Sustaita
Deposited On:12 Jan 2011 18:22
Last Modified:03 Oct 2019 02:25

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