Cinefluorography of Solid Fuel Rocket Motors

2009 ◽  
pp. 51-51-11
Author(s):  
E. L. Criscuolo ◽  
D. Polansky
Keyword(s):  
Solid Fuel ◽  
Rocket Motors

The response of the solid fuel ramjet combustor to the inflow excitations

2021 ◽  
pp. 095441002110534
Author(s):  
AmirMahdi Tahsini ◽  
Seyed Saeid Nabavi
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Solid Fuel ◽  
Ambient Pressure ◽  
Excitation Frequency ◽  
Engine Performance ◽  
Computational Domain ◽  
Rocket Motors ◽  
Fuel Mass

The response of the solid fuel ramjet to the imposed excitations of the ambient pressure is investigated using full part computation of the system including the intake, combustion chamber, and exhaust nozzle. The finite volume solver of the turbulent reacting compressible flow is used to simulate the flow field, where two grid blocks are considered for discretizing the computational domain. Both impulsive and oscillatory excitations are imposed to predict the response of the solid fuel mass flow rate. The results demonstrate that strong fuel flow overshoot occurs in the case of sudden impulsive excitation which is omitted for gradual impulsive excitations. In addition, the oscillatory excitations eventually lead to regular oscillatory response with frequencies similar to the imposed excitations and decrease the average fuel mass flow rate independent of the excitation frequency. But the amplitude of the response depends on the excitation frequency and amplification occurs in some frequencies. This behavior is not related to the combustion instabilities and is similar to the L-star instability in the solid rocket motors. In the design and analysis of the solid fuel ramjets, the coupling of the flight dynamics and the engine performance must be considered, and this study is the first step of such complete methodology to have more accurate predictions.

Solid-fuel Rocket Engines: Layered Composite Materials Manufacturing and Thermal Diffusivity Measurements

2014 ◽  
Vol 33 (2) ◽  
pp. 171-177 ◽  
Author(s):  
Adam Dominiak ◽  
Michał Rąpała ◽  
Roman Domański ◽  
Bartosz Bartkowiak ◽  
Piotr Darnowski
Keyword(s):  
Composite Materials ◽  
Thermal Diffusivity ◽  
Solid Fuel ◽  
High Performance ◽  
Phenol Formaldehyde ◽  
Basalt Fiber ◽  
Layered Composite ◽  
Rocket Engines ◽  
Rocket Motors ◽  
Diffusivity Measurements

AbstractThis communication presents thermal diffusivity measurements of fourteen layered insulating composite materials. Composite materials that were taken under investigation contained matrixes based on epoxy and phenol-formaldehyde resins and reinforcements, such as glass, basalt fiber and wrapping or ceramic paper. They were all prepared by the Rocket Section of the Students Space Association (RS-SSA). Manufacturing process of samples is described. Additional objective of this research was to obtain the quality of such prepared materials and if they are reliable enough to be used in solid-fuel rocket motors. Use of composite materials to build combustion chamber walls of solid fuel rocket engines, rather than metal, leads to weight reduction and increases amount of fuel that rocket can carry. That improves performances and gives new possibilities for rocket applications. To apply new high performance solid fuels, development of new composite materials was required. Analysis of thermal properties gives the answer, which material should be used for new solid-fuel rockets designed by RS-SSA.

Variability analysis of ABS solid fuel manufactured by fused deposition modeling for hybrid rocket motors

2021 ◽  
Vol 15 (2) ◽  
pp. 8029-8041
Author(s):  
Jose Alejandro Urrego ◽  
Fabio Arturo Rojas ◽  
Jaime Roberto Muñoz
Keyword(s):  
Combustion Chamber ◽  
Solid Fuel ◽  
Fused Deposition Modeling ◽  
Rocket Engine ◽  
Acrylonitrile Butadiene Styrene ◽  
Hybrid Rocket ◽  
Rocket Motors ◽  
Fused Deposition ◽  
Manufacture Process ◽  
Direct Digital Manufacturing

The process of fused deposition material (FDM) was used to manufacture propellant grains of Acrylonitrile Butadiene Styrene (ABS) as novel rocket fuel grain, with three types of geometry in the burning port. These solid fuel grains were used to measure the typical characteristics of combustion in rocket motors such as thrust and pressure inside the combustion chamber, seeking to obtain preliminary characteristics of operation and analyze the effect of combustion port geometry on pressure and thrust, using Multivariate Analysis of Variance (MANOVA) as statistical method. Two of the three geometries were manufactured with a helical-finocyl configuration, specially designed to be fabricated by Direct Digital Manufacturing (DDM), the other one was a straight-bore geometry also by DDM. This characterization experiment was performed on a static hybrid rocket engine, designed to inject 99.98% pure nitrous oxide into a combustion chamber with capacity to withstand 6.9 MPa of pressure, with an easy-to-exchange nozzle, avoiding erosive behavior in the throat. Statistical analyses made with the ABS fuel grains, suggest a significant effect on rocket motor pressure and thrust, due to helical geometric changes made to the combustion port of solid fuel grains made by FDM manufacture process.

scholarly journals Solid-Fuel Regression Rate for Standard-Flow Hybrid Rocket Motors

2012 ◽  
Vol 7 (2) ◽  
pp. 387-398 ◽  
Author(s):  
Takakazu MORITA ◽  
Saburo YUASA ◽  
Shigeru YAMAGUCHI ◽  
Toru SHIMADA
Keyword(s):  
Solid Fuel ◽  
Hybrid Rocket ◽  
Regression Rate ◽  
Rocket Motors

Gas dynamics of combustion-chamber processes in solid-fuel rocket motors

1992 ◽  
Vol 35 (8) ◽  
pp. 769-776
Author(s):  
E. A. Kozlov ◽  
A. B. Vorozhtsov ◽  
S. S. Bondarchuk
Keyword(s):  
Combustion Chamber ◽  
Solid Fuel ◽  
Gas Dynamics ◽  
Rocket Motors

Modeling of Solid Fuel Combustion in Furnaces with a Circulating Fluidized Bed

2008 ◽  
Vol 39 (1) ◽  
pp. 65-78
Author(s):  
Yu. S. Teplitskii ◽  
V. A. Borodulya ◽  
V. I. Kovenskii ◽  
E. P. Nogotov
Keyword(s):  
Fluidized Bed ◽  
Solid Fuel ◽  
Circulating Fluidized Bed ◽  
Fuel Combustion ◽  
Solid Fuel Combustion
Sign in / Sign up

Export Citation Format

Share Document