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Computational algorithm for hybrid rocket motor preliminary design [PDF]

open access: yesKafrelsheikh Journal of Information Sciences, 2021
Hybrid rockets present a compromise between solid and liquid rockets. It has a simpler design than liquid rockets and higher performance than solid rockets. It is constructed from an oxidizer tank followed by a solid fuel grain. Therefore, the combustion
Mohamed Sakr
doaj   +1 more source

Effect of Penetrative Combustion on Regression Rate of 3D Printed Hybrid Rocket Fuel

open access: yesAerospace, 2022
3D printing manufacturing is used to manufacture hybrid rocket fuel grains featuring a special grid-like structure in order to control combustion performance.
Xiaodong Yu   +4 more
doaj   +1 more source

Combustion Characteristics of a Swirl-Radial-Injection Composite Fuel Grain with Applications in Hybrid Rockets

open access: yesAerospace, 2023
The combustion characteristics of a swirl-radial-injection composite fuel grain were experimentally and numerically investigated. This composite grain permits swirl-radial oxidizer injection based on three hollow helical blades, each having a constant ...
Ruoyan Wang   +7 more
doaj   +1 more source

Combustion Characteristics of HTPB-Based Hybrid Rocket Fuels: Using Nickel Oxide as the Polymer Matrix Pyrolysis Catalyst

open access: yesAerospace, 2023
The slow regression rate induced by the high pyrolysis difficulty has limited the application and development of hydroxyl-terminated polybutadiene (HTPB)-based fuels in hybrid rocket propulsion.
Hongsheng Yu   +5 more
doaj   +1 more source

Rates of convergence for regression with the graph poly-Laplacian

open access: yesSampling Theory, Signal Processing, and Data Analysis, 2023
AbstractIn the (special) smoothing spline problem one considers a variational problem with a quadratic data fidelity penalty and Laplacian regularization. Higher order regularity can be obtained via replacing the Laplacian regulariser with a poly-Laplacian regulariser.
Nicolás García Trillos   +2 more
openaire   +4 more sources

Numerical Investigation on Hybrid Rocket Motors with Star-Segmented Rotation Grain

open access: yesAerospace, 2022
A novel fuel grain configuration comprising two star-segmented grains is proposed. The effect of the rotation, mid-chamber length, and segmented position on the fuel regression rate and the combustion efficiency in hybrid rocket motors with star ...
Hui Tian   +5 more
doaj   +1 more source

Regression

open access: yes, 2021
Regression analysis between mutation rate, effective population size (Ne), and genome ...
Xiaojun Wang (9353387)
core   +2 more sources

Local Logit Regression for Recovery Rate [PDF]

open access: yesSSRN Electronic Journal, 2017
We propose a flexible and robust nonparametric local logit regression for ...
Sopitpongstorn, Nithi   +2 more
openaire   +1 more source

Beeswax–EVA/Activated-Charcoal-Based Fuels for Hybrid Rockets: Thermal and Ballistic Evaluation

open access: yesEnergies, 2022
Beeswax (C46H92O) is a naturally derived substance that has the potential to be used as a solid fuel for hybrid rocket applications and as a substitute for paraffin wax fuel in hybrid rockets.
Sri Nithya Mahottamananda   +3 more
doaj   +1 more source

Dynamic Numerical Simulation of Hybrid Rocket Motor with HTPB-Based Fuel with 58% Aluminum Additives

open access: yesAerospace, 2022
The addition of aluminum (Al) to the fuel is an effective way to increase the regression rate of hybrid rocket motors (HRMs). Due to its high regression rate, the impact of the regression of combustion surface on the performance of HRMs cannot be ignored.
Hui Tian   +5 more
doaj   +1 more source

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