Results 21 to 30 of about 2,308,912 (234)

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

open access: yesAerospace, 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   +9 more
doaj   +1 more source

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

open access: yesFirePhysChem, 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

open access: yesFirePhysChem, 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   +3 more
doaj   +1 more source

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

open access: yesApplied 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   +5 more
doaj   +1 more source

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

open access: yesAerospace, 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   +5 more
doaj   +1 more source

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

open access: yesHepatology, 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   +4 more
wiley   +1 more source

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

open access: yesJournal 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 investigation of erosion rate of insulation materials using hybrid rockets

open access: yesFirePhysChem, 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   +2 more
doaj   +1 more source

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

open access: yesFirePhysChem, 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   +4 more
doaj   +1 more source

Investigation of regression rate end-burning typed hybrid rocket motor

open access: yes, 2023
Hybrid rocket motor has a critical weakness that impacts performance: low regression rate. Due to this, extensive investigation has been done on end-burning hybrid rocket motors to enhance the regression rate. Experimental works were conducted on the end-
Abdullah, Nur Azam   +3 more
core   +1 more source

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