Results 31 to 40 of about 1,084 (226)

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

CD8+ T cell memory is sustained in mice by hepatic stellate cells

Hepatology, EarlyView., 2022
HSC role in memory CD8+ T cell maintenance. Abstract Background and Aims Long‐lasting immunological memory is the ultimate goal of vaccination. Homeostatic maintenance of memory CD8+ cytotoxic T cells (MemCD8TCs) is thought to be mediated by IL‐15/IL‐15R heterodimer (15HD)‐expressing myeloid cells.
Yi‐Ting Chen, Yu‐Chia Su, Yee‐Ern Or, Chin‐Fu Cheng, John T. Kung   +4 more
wiley   +1 more source

Explicit Modelling of the Ignition Transient Structural Response of a Paraffin Wax Hybrid Rocket Motor Fuel Grain [PDF]

Journal of Aerospace Technology and Management, 2021
Paraffin wax has been identified as a hybrid rocket motor fuel, which offers enhanced regression rates and improved combustion performance. While various investigations into the performance of this class of fuels are being conducted around the world ...
Kirsty Veale, Jean Pitot, Clinton Bemont
doaj   +3 more sources

Experimental Research on Reconstruction Techniques for Instantaneous Regression Rate of Hybrid Rocket Motor with Single-Port Wagon Wheel Fuel Grain

Aerospace, 2023
This study investigated reconstruction techniques for building the instantaneous fuel regression rate of the hybrid rocket motor (HRM). Specifically, an experiment in a laboratory 500 N-class hybrid rocket motor with single-port wagon wheel fuel grain ...
Tianfang Wei, Guobiao Cai, Hui Tian, Yuanjun Zhang, Chengen Li, Xiangyu Meng   +5 more
doaj   +1 more source

Experimental investigation of erosion rate of insulation materials using hybrid rockets

FirePhysChem, 2021
Thermal insulation is essential to protect the exposed surface from high-temperature and high heat flux situations. The selection of suitable insulation materials plays a crucial role in determining rocket performance.
Phaninder Reddy Vaka, Nikunj Rathi, P.A. Ramakrishna   +2 more
doaj   +1 more source

Review on the regression rate-improvement techniques and mechanical performance of hybrid rocket fuels

FirePhysChem, 2021
Human spaceflight, space tourism, and the launch of microsatellites are all expected to grow in the future. In fact, with the recent increase of the satellite market, almost 1000 smallsats per year are foreseen to be launched over the next decade. Hybrid
Yash Pal, Sri Nithya Mahottamananda, Sasi Kiran Palateerdham, Sivakumar Subha, Antonella Ingenito   +4 more
doaj   +1 more source

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

Journal of Mechanical Engineering and Sciences, 2021
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.
Jose Alejandro Urrego, Fabio Arturo Rojas, Jaime Roberto Muñoz   +2 more
doaj   +1 more source

Swirled injector modeling for cavitating multiphase flow [PDF]

E3S Web of Conferences, 2019
The goal of this study is to present a comparison between different approaches to multiphase injection modeling of self-pressurized rocket engine propellant.
Ziegler Bartosz, Mosędrżny Jędrzej, Lewandowska Natalia   +2 more
doaj   +1 more source