Results 111 to 120 of about 13,180 (230)

Explainable Data Mining Framework of Identifying Root Causes of Rocket Engine Anomalies Based on Knowledge and Physics-Informed Feature Selection

open access: yesMachines
Liquid rocket engines occasionally experience abnormal phenomena with unclear mechanisms, causing difficulty in design improvements. To address the above issue, a data mining method that combines ante hoc explainability, post hoc explainability, and ...
Xiaopu Zhang, Wubing Miao, Guodong Liu
doaj   +1 more source

Metal-organic frameworks as hypergolic additives for hybrid rockets. [PDF]

open access: yesChem Sci, 2022
Jobin O   +8 more
europepmc   +1 more source

Advanced Earth-to-orbit propulsion technology program overview: Impact of civil space technology initiative [PDF]

open access: yes
The NASA Earth-to-Orbit (ETO) Propulsion Technology Program is dedicated to advancing rocket engine technologies for the development of fully reusable engine systems that will enable space transportation systems to achieve low cost, routine access to ...
Stephenson, Frank W., Jr.
core   +1 more source

Numerical simulation of long and slender cylinders vibrating in axial flow applied to the Myrrha reactor [PDF]

open access: yes, 2012
Flow induced vibrations are an important concern in the design of nuclear reactors. One of the possible designs of the 4th generation nuclear reactors is a lead-cooled fast reactor of which MYYRHA is a prototype.
De Ridder, Jeroen   +3 more
core   +1 more source

H2 fueled flightweight ramjet construction and test [PDF]

open access: yes
The ACES Program began the investigation of regeneratively cooled ramjet engines for propelling aircraft at Mach 6 to 8 flight regimes while collecting and processing air for later use as oxidizer in rocket propulsion into an orbit flight mode.
Malek, Albert
core   +1 more source

Hybrid holographic non-destructive test system [PDF]

open access: yes, 1978
An automatic hybrid holographic non-destructive testing (HNDT) method and system capable of detecting flaws or debonds contained within certain materials are described.
Kurtz, R. L.
core   +1 more source

Swirl Injection Effects on Hybrid Rocket Motors

open access: yesJournal 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   +2 more
doaj  

Launch vehicle performance using metallized propellants [PDF]

open access: yes
Metallized propellant propulsion systems are considered as replacements for the solid rocket boosters and liquid sustainer stages on the current launch vehicles: both the Space Transportation System (STS) and the Titan 4.
Palaszewski, Bryan A., Powell, Richard
core   +1 more source

Space Transportation Materials and Structures Technology Workshop [PDF]

open access: yes
The Space Transportation Materials and Structures Technology Workshop was held on September 23-26, 1991, in Newport News, Virginia. The workshop, sponsored by the NASA Office of Space Flight and the NASA Office of Aeronautics and Space Technology, was ...
Cazier, Frank W., Jr., Gardner, James E.
core   +1 more source

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