Volume 28 Issue 12
Dec.  2013
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WANG Hong-yue, TANG Zhen-yu, HE Bi-jiao, CAI Guo-biao. Microwave attenuation in vacuum plume of the liquid-propellant rocket engine[J]. Journal of Aerospace Power, 2013, 28(12): 2849-2856.
Citation: WANG Hong-yue, TANG Zhen-yu, HE Bi-jiao, CAI Guo-biao. Microwave attenuation in vacuum plume of the liquid-propellant rocket engine[J]. Journal of Aerospace Power, 2013, 28(12): 2849-2856.

Microwave attenuation in vacuum plume of the liquid-propellant rocket engine

  • Received Date: 2012-11-08
  • Publish Date: 2013-12-28
  • The microwave attenuation in the vacuum plume of the liquid-propellant rocket engine was studied. Based on a sample of the bipropellant engine, the electron number densities in the chamber was calculated using a thermodynamic calculation code. The ionization and recombination processes in the nozzle were simulated under the assumption of frozen components or limited reaction rate. The electron number densities in the plume and the microwave attenuation of 5-30GHz were estimated. It is shown that the number densities are within the range of 1013-1014cm-3 and 1010-1011cm-3, respectively, for the chamber and the exit of the nozzle. The alkali metals, K and Na, are main contributors of electrons while Cl- and OH- are main electron absorber. The attenuation is more serious for the microwave of lower frequency and oblique path, as high as 4.5dB in case of 5 GHz.

     

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