Evaluation of Ablation and Longitudinal Vortices in Solid Rocket Motor by Computational Fluid Dynamics

2006 ◽  
Author(s):  
Yu Daimon ◽  
Toru Shimada ◽  
Nobuyuki Tsuboi ◽  
Ryoji Takaki ◽  
Kazuhisa Fujita ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Rocket Motor ◽  
Solid Rocket Motor ◽  
Longitudinal Vortices ◽  
Solid Rocket

Computational Fluid Dynamics Simulation of Combustion Instability in Solid Rocket Motor : Implementation of Pressure Coupled Response Function

2016 ◽  
Vol 66 (3) ◽  
pp. 216 ◽  
Author(s):  
S. Saha ◽  
D. Chakraborty
Keyword(s):  
Fluid Dynamics ◽  
Growth Rate ◽  
Computational Fluid Dynamics ◽  
Response Function ◽  
Combustion Instability ◽  
Rocket Motor ◽  
Dynamics Simulation ◽  
Solid Rocket Motor ◽  
Pressure Oscillations ◽  
Solid Rocket

<p class="NomenclatureClauseTitle">Combustion instability in solid propellant rocket motor is numerically simulated by implementing propellant response function with quasi steady homogeneous one dimensional formulation. The convolution integral of propellant response with pressure history is implemented through a user defined function in commercial computational fluid dynamics software. The methodology is validated against literature reported motor test and other simulation results. Computed amplitude of pressure fluctuations compare closely with the literarture data. The growth rate of pressure oscillations of a cylindrical grain solid rocket motor is determined for different response functions at the fundamental longitudinal frequency. It is observed that for response function more than a critical value, the motor exhibits exponential growth rate of pressure oscillations.</p>

Stability Analysis of Solid Rocket Motor Combustion by Computational Fluid Dynamics

AIAA Journal ◽  
2008 ◽  
Vol 46 (4) ◽  
pp. 947-957 ◽  
Author(s):  
Toru Shimada ◽  
Masahisa Hanzawa ◽  
Takakazu Morita ◽  
Takashi Kato ◽  
Takashi Yoshikawa ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Stability Analysis ◽  
Rocket Motor ◽  
Solid Rocket Motor ◽  
Solid Rocket

Optimization Design for Contour of Pintle Nozzle in Solid Rocket Motor Based on Response Surface Method

2014 ◽  
Vol 1016 ◽  
pp. 640-645 ◽  
Author(s):  
Chen Cheng ◽  
Fu Ting Bao ◽  
Hao Xu
Keyword(s):  
Fluid Dynamics ◽  
Response Surface ◽  
Response Surface Method ◽  
Optimization Design ◽  
Specific Impulse ◽  
Rocket Motor ◽  
Shape Parameters ◽  
Solid Rocket Motor ◽  
Surface Method ◽  
Solid Rocket

In aim to gain the capability of providing variable thrust, the technology of an axial pintle inserted into the nozzle of the solid rocket motor had been used. As the pintle inserted into the nozzle, the loss of specific impulse will increase. In order to reduce the loss of fluid dynamics of the pintle nozzle, considering the interaction of the nozzle contour and the pintle contour, CFD method combined with the response surface method is used to optimize the contour of the pintle nozzle. The central composite design is used to introduce a design point; the Kriging algorithm is used to generate the response surface; and the Nonlinear Programming by Quadratic Lagrangian is used for optimization. After the optimization, the loss of fluid dynamics can be reduced significantly. To study the influence of the key parameters to the loss of specific impulse, the key parameters are optimized independently in this paper. It indicates that the main factor of the loss of specific impulse is the parameters of the nozzle. To reduce the computational consumption, the process of optimization has been improved. And the result shows that when optimizing a pintle nozzle, the nozzle part and the pintle part can be optimized separately. The method that bases on the response surface not only takes into account of the interactive effects of the shape parameters, but also works with less calculation. Additionally it maintains the high accuracy and reliability. It can be used to select the optimal shape parameters of the pintle nozzle quickly, which has certain engineering application value.

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