Results 21 to 30 of about 11,282 (264)

The design and performance on 200N-class bipropellant rocket engine using decomposed H2O2 and Kerosene [PDF]

INCAS Bulletin, 2019
Mono-propellant thrusters are widely utilized in satellites and space launchers. In many cases, they are using hydrazine as a propellant. However, hydrazine has high toxicity and high risks in using for launch campaign.
Yang-Suk LEE, Jun Hwan JANG
doaj   +1 more source

Fault Diagnosis in Partially Observable Petri Nets with Quantum Bayesian Learning

Applied Sciences, 2023
This paper investigates the quantum Bayesian probability estimation of fault diagnosis based on Partially Observable Petri Nets (POPN) for a liquid-propellant rocket engine system.
Jiufu Liu, Elishahidi S. B. Mvungi, Xinzhe Zhang, Aurea Dias   +3 more
doaj   +1 more source

Procedure for determining the effect of internal and external factors on the startup thrust spread of a liquid-propellant rocket engine

Technical mechanics, 2021
Despite of the package of measures to adjust a liquid-propellant rocket engine (LPRE) to a specified operating regime, minimum acceptable spreads in the geometrical parameters and operating conditions of its units and assemblies steel remain.
O. Pylypenko, S. Dolgopolov, N. V. Khoriak, N.D. Nikolayev   +3 more
semanticscholar   +1 more source

Effect of Secondary Combustion on Thrust Regulation of Gas Generator Cycle Rocket Engine

Applied Sciences, 2022
Thrust regulation is applied to maintain the performance of the liquid propellant rocket engine. The thrust level of a rocket engine can be readily controlled by adjusting the number of propellants introduced into the combustion chamber. In this study, a
Sohaib Khan, Muhammad Umer Sohail, Ihtzaz Qamar, Muzna Tariq, Raees Fida Swati   +4 more
doaj   +1 more source

A Coupled Heat Transfer Calculation Strategy for Composite Cooling Liquid Rocket Engine

Aerospace, 2023
To better understand the characteristics of coupled heat transfer in liquid rocket engines, a calculation scheme is proposed in this paper. This scheme can simulate the coupled heat transfer processes, including combustion and flow in the thrust chamber,
Bo Xu, Bing Chen, Jian Peng, Wenyuan Zhou, Xu Xu   +4 more
doaj   +1 more source

Study of pressure surge during priming phase of start transient in an initially unprimed pump-fed liquid rocket engine

Propulsion and Power Research, 2022
In this paper, transient phenomenon during start up process of a pump fed liquid rocket engine is investigated through numerical simulation. The engine studied in this work is designed such that engine systems are not wetted with propellant until the ...
Debanjan Das, P. Padmanabhan
doaj   +1 more source

Regenerative Cooling Comparison of LOX/LCH₄ and LOX/LC₃H₈ Rocket Engines Using the One-Dimensional Regenerative Cooling Modelling Tool ODREC

Applied Sciences, 2023
Due to the extreme temperatures inside the combustion chambers of liquid propellant rocket engines, the walls of the combustion chamber and the nozzle are cooled by either the fuel or the oxidizer in what is known as regenerative cooling.
Yigithan Mehmet Kose, Murat Celik
doaj   +1 more source

Comparison of Optimization Techniques and Objective Functions Using Gas Generator and Staged Combustion LPRE Cycles

Applied Sciences, 2022
This paper compares various optimization techniques and objective functions to obtain optimum rocket engine performances. This research proposes a modular optimization framework that provides an optimum design for Gas Generator (GG) and Staged Combustion
Suniya Sadullah Khan, Ihtzaz Qamar, Muhammad Umer Sohail, Raees Fida Swati, Muhammad Azeem Ahmad, Saad Riffat Qureshi   +5 more
doaj   +1 more source

Multi-Scenario Trajectory Optimization for Vertical Takeoff and Vertical Landing Vehicles Using the Gauss Pseudospectral Method

Aerospace, 2022
Vertical takeoff and vertical landing (VTVL) vehicles, based on throttling liquid rocket engines, are attracting increasing attention for their validation of guidance and control techniques during landing.
Yang Liu, Chenyang Li, Xiongfeng Zhu, Qiulong Han, Peng Cui, Dongdong Zhang   +5 more
doaj   +1 more source

Verification of a hydrodynamic model of a liquid-propellant rocket engine’s cavitating pumps using experimental and theoretical pump transfer matrices

Technical mechanics, 2020
Cavities at the pump inlet may lead to inadmissible cavitation self-oscillations in the feed system of liquid-propellant rocket engines (LPREs) and to POGO instability if the oscillation frequency of the liquid is close to that of the rocket structure ...
S. Dolgopolov
semanticscholar   +1 more source