Movement of hydrometeor particle cloud in bow shock layer
Abstract
During reentry, high speed vehicles may encounter condensed phase H2O in the form of ice particles or liquid droplets, which form so called particle clouds. These particles must traverse the shocked air layer enveloping the reentering vehicle prior to impacting the surface. The interaction between the gas and the particles in the shock layer is usually investigated by calculating the trajectory of every particle in the gas flow field with consideration of the presence of other particles (this method is called one-way coupling). A gas-(solid and liquid) particle two fluid flow model is presented, including the interaction (i.e., the mass, momentum and heat transfer) between the two phases (that is, a two way coupling is taken into account), and the dissociation and ionization of the air and the dissociation of the steam (from the particle cloud). The model is solved by using the line method. The flow field of gas and the particle cloud is obtained, and the applicable range of one way coupling is studied. Finally some interesting discussions are presented.
- Publication:
-
China Rept Sci Technol JPRS CST
- Pub Date:
- March 1986
- Bibcode:
- 1986ChRST......100Z
- Keywords:
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- Bow Waves;
- Cloud Physics;
- Clouds (Meteorology);
- Fluid-Solid Interactions;
- Hydrometeorology;
- Shock Layers;
- Drops (Liquids);
- Flow Distribution;
- Gas Flow;
- Ice;
- Particle Trajectories;
- Spacecraft Reentry;
- Engineering (General)