Longitudinally-Variable Hybrid Rocket Regression Rate Model with Radiation and Boundary Layer Effects

2013 ◽  
Author(s):  
Shannon D. Eilers ◽  
Stephen A. Whitmore
Keyword(s):  
Boundary Layer ◽  
Rate Model ◽  
Hybrid Rocket ◽  
Regression Rate

Hybrid rocket combustion regression rate model.

AIAA Journal ◽  
1966 ◽  
Vol 4 (4) ◽  
pp. 752-753 ◽  
Author(s):  
EUGENE MILLER
Keyword(s):  
Rate Model ◽  
Hybrid Rocket ◽  
Regression Rate ◽  
Hybrid Rocket Combustion

scholarly journals Experimental Investigation on Combustion Characteristics of Hybrid Rocket Fuels with Multi-Angle Diverging Injector

2020 ◽  
Vol 5 (2) ◽  
pp. 12
Author(s):  
Pragya Berwal ◽  
Shelly Biswas
Keyword(s):  
Heat Transfer ◽  
Boundary Layer ◽  
Combustion Process ◽  
Combustion Efficiency ◽  
Heat Fluxes ◽  
Paraffin Wax ◽  
Hybrid Rocket ◽  
Gaseous Oxygen ◽  
Regression Rate ◽  
Fuel Surface

Injection pattern of the oxidizer injected into the combustion chamber is a significant factor in evaluating the performance of a hybrid rocket. In the hybrid rocket combustion process, oxidizer flows over the solid fuel grain surface, leading to a turbulent diffusion boundary layer formation and the flame is established inside the boundary layer. The heat transfer from flame to the fuel surface leads to pyrolysis of the fuel. The heat fluxes, due to pyrolysis, block the heat transfer further to the fuel surface, thus reducing the fuel regression rate. An attempt has been made in this paper to design and study the effect of the multi-angle diverging injector on the enhancement of the fuel regression rate and combustion efficiency of the hybrid rocket. The designed injector was compared with a shower head injector i.e., axial injector. The fuels used were paraffin wax and polyvinyl chloride (PVC) with gaseous oxygen as oxidizer. The effect of formation of the re-circulation zone and flow velocity were studied numerically by a cold flow simulation using ANSYS-Fluent software. It has been observed that direct impingement of the multi-angle diverging injector produces velocity in three directions, leading to distortion of the boundary layer. An increase of 8% in the average fuel regression rate for PVC fuel grain and 36.14% for paraffin wax fuel grain was observed, as compared to the shower head injector for the same oxidizer mass flow rate. A combustion efficiency increase of 38% and 14% was also observed using multi-angle diverging injector for PVC and paraffin wax fuel grains, respectively. A reduction in sliver and uniform fuel consumption was also observed using the novel multi-angle diverging injector.

A Visual Study of the Combustion of High-Regression Rate and Classical Hybrid Rocket Fuels

2015 ◽  
Author(s):  
Elizabeth T. Jens ◽  
Victor A. Miller ◽  
Flora S. Mechentel ◽  
Brian J. Cantwell ◽  
Scott Hubbard
Keyword(s):  
Hybrid Rocket ◽  
Regression Rate ◽  
Visual Study

Dynamic characteristics study of regression rate in variable thrust hybrid rocket motor

2022 ◽  
Author(s):  
Tian Hui ◽  
Meng Xiangyu ◽  
Zhu Hao ◽  
Li Chengen ◽  
Yu Ruipeng ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Rocket Motor ◽  
Hybrid Rocket ◽  
Regression Rate ◽  
Hybrid Rocket Motor

scholarly journals Fuel Regression Rate Behavior of CAMUI Hybrid Rocket

2009 ◽  
Vol 7 (ists26) ◽  
pp. Pa_77-Pa_80 ◽  
Author(s):  
Yudai KANEKO ◽  
Mitsunori ITOH ◽  
Akihito KAKIKURA ◽  
Kazuhiro MORI ◽  
Kenta UEJIMA ◽  
...  
Keyword(s):  
Hybrid Rocket ◽  
Regression Rate ◽  
Rate Behavior
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