Results 11 to 20 of about 14,246 (239)

Solid Rocket Motor Design Using Hybrid Optimization [PDF]

International Journal of Aerospace Engineering, 2012
A particle swarm/pattern search hybrid optimizer was used to drive a solid rocket motor modeling code to an optimal solution. The solid motor code models tapered motor geometries using analytical burn back methods by slicing the grain into thin sections ...
Kevin Albarado, Roy Hartfield, Wade Hurston, Rhonald Jenkins   +3 more
doaj   +2 more sources

Swirl Injection Effects on Hybrid Rocket Motors

Journal of Aerospace Technology and Management, 2015
In the last decades, hybrid rocket engines have been increasingly studied and used in space vehicles. However, the low regression rates and specific impulses still represent major drawbacks to this technology. The objective of this study was to quantify
Susane Ribeiro Gomes, Leopoldo Rocco Junior, José Atílio Fritz Fidel Rocco   +2 more
doaj   +4 more sources

Closed Loop Throttle Control of a Liquefying Fuel Hybrid Rocket Motor [PDF]

Journal of Aerospace Technology and Management, 2021
The thrust produced by a hybrid rocket motor (HRM) can be controlled by varying the oxidizer flow rate to the combustion chamber. This feature is useful in shaping motor thrust profiles and optimizing a vehicle flight trajectory, but propellant ...
Timothy Velthuysen, Michael Brooks, Jean Pitot   +2 more
doaj   +2 more sources

Experimental Investigation into Closed-Loop Control for HTPB-Based Hybrid Rocket Motors

Aerospace, 2023
Space exploration greatly facilitates the development of advanced propulsion systems. Extensive research has shown that hybrid rocket motors have bright prospects for use in variable-thrust propulsion systems.
Guang Tan, Hui Tian, Zhongshuo Wang, Zihao Guo, Jingfei Gao, Yuanjun Zhang, Guobiao Cai   +6 more
doaj   +1 more source

Multi-Objective, Multi-Disciplinary Design Optimization and Multi-Attribute Evaluation of Hybrid Rocket Motors Used for Manned Lunar Lander

Aerospace, 2023
This paper proposed a multi-objective, multi-disciplinary design optimization and multi-attribute evaluation method for the manned lunar lander descent stage.
Yang Liu, Xintong Li, Pengcheng Wang, Xiaotian Zhang, Hao Zhu, Guobiao Cai   +5 more
doaj   +1 more source

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

Aerospace, 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, Xianzhu Jiang, Yudong Lu, Yu Liang, Hao Zhu, Guobiao Cai   +5 more
doaj   +1 more source

Development of Green Storable Hybrid Rocket Propulsion Technology Using 98% Hydrogen Peroxide as Oxidizer

Aerospace, 2021
This paper presents the development of indigenous hybrid rocket technology, using 98% hydrogen peroxide as an oxidizer. Consecutive steps are presented, which started with interest in hydrogen peroxide and the development of technology to obtain High ...
Adam Okninski, Pawel Surmacz, Bartosz Bartkowiak, Tobiasz Mayer, Kamil Sobczak, Michal Pakosz, Damian Kaniewski, Jan Matyszewski, Grzegorz Rarata, Piotr Wolanski   +9 more
doaj   +1 more source

Development of 200 N-class throttleable hybrid rocket motor for lunar module application

FirePhysChem, 2021
In this study, ground tests of a lab-scale hybrid rocket motor were conducted to verify the feasibility of the hybrid propulsion system for lunar lander application.
Donghee Lee, Seongjoo Han, Heejang Moon
doaj   +1 more source

Hybrid rocket propulsion technology for space transportation revisited - propellant solutions and challenges

FirePhysChem, 2021
This paper presents the status of developments worldwide regarding use of hybrid rocket motors for space transportation. Historical roots are presented and reasons for revisiting hybrid technology after a few decades of limited interest are examined ...
Adam Okninski, Wioleta Kopacz, Damian Kaniewski, Kamil Sobczak   +3 more
doaj   +1 more source

Effect of High-Mass Fraction of Aluminum on Catalytic Hybrid Rocket Motor

Applied Sciences, 2022
Catalytic hybrid rocket motors using hydrogen peroxide (HP) are easy and efficient to achieve multiple starts and stops, and hydroxyl-terminated polybutadiene (HTPB) grains are commonly used due to their excellent mechanical properties.
Hui Tian, Zhongshuo Wang, Hao Zhu, Yudong Lu, Jingfei Gao, Guobiao Cai   +5 more
doaj   +1 more source