Results 91 to 100 of about 190,559 (293)
The hard start phenomena in hypergolic engines. Volume 1: Bibliography [PDF]
A bibliography of reports pertaining to the hard start phenomenon in attitude control rocket engines on Apollo spacecraft is presented. Some of the subjects discussed are; (1) combustion of hydrazine, (2) one dimensional theory of liquid fuel rocket ...
Miron, Y., Perlee, H. E.
core +1 more source
Journal of the American Ceramic Society, EarlyView.➢ A one‐step selective laser reaction pyrolysis (SLRP) technique was developed to rapidly synthesize hafnium carbide (HfC) from liquid polymer precursors. ➢ XRD and TEM confirmed the nanocrystalline structure of the HfC. ➢ The SLRP‐based process achieved up to 54% ceramic yield, 18% higher than furnace‐based methods.
Shalini Rajpoot +3 more
wiley +1 more source
An MPC Approach to Transient Control of Liquid-Propellant Rocket Engines [PDF]
arXiv, 2019 The current context of launchers reusability requires the improvement of control algorithms for their liquid-propellant rocket engines. Their transient phases are generally still performed in open loop. In this paper, it is aimed at enhancing the control performance and robustness during the fully continuous phase of the start-up transient of a generic
arxiv
A study of high frequency nonlinear combustion instability in baffled annular liquid propellant rocket motors, volume 1 Final report, 25 Aug. 1969 - 25 Sep. 1970 [PDF]
High frequency nonlinear combustion instability in baffled annular liquid propellant rocket engines - Vol.
Burstein, S. Z., Schechter, H. S.
core +1 more source
, 1975 A space vehicle having an improved ascent configuration for use in traveling in space is presented. Components of the vehicle are: (1) a winged orbiter having an elongater fuselage and rearwardly directed main engines fixed to the fuselage; (2) an ...
Vonpragenau, G. L.
core +1 more source
Policy &Internet, Volume 17, Issue 2, June 2025.ABSTRACT The article argues that the European Central Bank's (ECB) regulatory stance toward cryptocurrencies was underpinned by efforts to preserve legitimacy and monetary sovereignty. Triangulating a content analysis on the ECB's policy statements on cryptocurrencies, examination of European macroeconomic data, and price dynamic analysis of Bitcoin ...
Anson Au
wiley +1 more source
Performance of a circular body earth-to-orbit winged transport with various strap-on boosters [PDF]
Various types of twin strap-on boosters were evaluated by applying them to a core vehicle. The core vehicle has a clipped delta wing and a simple circular body, and is equipped with five Space Shuttle main engines.
Macconochie, Ian O. +2 more
core +1 more source
Journal of Geophysical Research: Planets, Volume 130, Issue 6, June 2025.Abstract This study investigates Hack crater in Arabia Terra on Mars, which exhibits remarkable water‐related landforms, suggesting a period of intense water activity despite lacking a connection with large‐scale fluvial networks. Instead, short valleys within its walls display morphologies indicative of mass‐wasting processes driven by groundwater ...
B. De Toffoli +3 more
wiley +1 more source
Numerical methods to prevent pressure oscillations in transcritical flows [PDF]
arXiv, 2017 The accurate and robust simulation of transcritical real-fluid effects is crucial for many engineering applications, such as fuel injection in internal combustion engines, rocket engines and gas turbines. For example, in diesel engines, the liquid fuel is injected into the ambient gas at a pressure that exceeds its critical value, and the fuel jet will
arxiv