Regression-Rate and Heat-Transfer Correlations for Hybrid Rocket Combustion

2001 ◽  
Vol 17 (1) ◽  
pp. 99-110 ◽  
Author(s):  
Martin J. Chiaverini ◽  
Kenneth K. Kuo ◽  
Arie Peretz ◽  
George C. Harting
Keyword(s):  
Heat Transfer ◽  
Hybrid Rocket ◽  
Regression Rate ◽  
Hybrid Rocket Combustion ◽  
Heat Transfer Correlations

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 Review of Classical Diffusion-Limited Regression Rate Models in Hybrid Rockets

Aerospace ◽  
2019 ◽  
Vol 6 (6) ◽  
pp. 75 ◽  
Author(s):  
Timothy Marquardt ◽  
Joseph Majdalani
Keyword(s):  
Radiation Effects ◽  
Hybrid Rocket ◽  
Physical Processes ◽  
Regression Rate ◽  
Rocket Motors ◽  
Diffusion Limited ◽  
Concise Review ◽  
Fluid Properties ◽  
Hybrid Rocket Combustion ◽  
Selection Of

In this article, we undertake a concise review of several milestone developments in classical regression rate models of hybrid rocket motors. After a brief description of the physical processes entailed in hybrid rocket combustion, Marxman’s diffusion-limited theory is re-constructed and discussed. Considerations beyond the scope of basic convection-driven models, which address disparate forms of the blowing correction, variable fluid properties, and pressure and radiation effects, are also given. Finally, a selection of kinetically-limited models is presented, with the aim of comparing the characteristics of several competing theories that become applicable under particular circumstances.

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
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