| Autor: |
S. Deepthi, S. K. Kumaresh, M. Arun, D. Aravind Kumar, J. Darshan Kumar |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Lecture Notes in Mechanical Engineering ISBN: 9788132210061 |
| DOI: |
10.1007/978-81-322-1007-8_39 |
| Popis: |
In this paper numerical studies have been carried out to examine the starting transient flow features of dual-thrust motors (DTMs) during the pre-ignition chamber conditions. Numerical computations have been carried out with the aid of a standard k-ω turbulence model. We concluded from the numerical results that in DTMs with highly loaded propellants the hot igniter gases can create pre-ignition thrust oscillations due to flow unsteadiness and recirculation. Under these conditions the convective flux to the surface of the propellant will be enhanced, which will create multiple-flame fronts leading to undesirable start-up transient. We also concluded that the prudent selection of the port geometry, without altering the propellant loading density, for damping the total temperature fluctuations within the motor is a meaningful objective for the suppression and control of instability and/or pressure/thrust oscillations often observed in solid propellant rockets with non-uniform port geometry. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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