Results 141 to 150 of about 892,130 (360)

The development of a post-test diagnostic system for rocket engines [PDF]

An effort was undertaken by NASA to develop an automated post-test, post-flight diagnostic system for rocket engines. The automated system is designed to be generic and to automate the rocket engine data review process.
Zakrajsek, June F.
core   +1 more source

Strategy for One‐Step Optimization of Metal Oxide Passivating Contact Materials for Si Heterojunction Solar Cells through Growth Angle Variation

Small, EarlyView.
A one‐step oblique angle reactive sputtering approach enables simultaneous tuning of bulk and interfacial stoichiometry in a metal oxide/ silicon heterojunction. In case of vanadium oxides, growth angle variation controls the formation of stoichiometric SiO2, ternary SiOx(V) interlayer, and phase purity of vanadium oxide, considerably simplifying the ...
Aparajita Mandal, Alexis Franquet, Hans Hofsäss, Tapobrata Som   +3 more
wiley   +1 more source

Numerical Analysis of Ejector Flow Performance for High-Altitude Simulation

Aerospace
In this study we perform a computational numerical analysis to examine the flow characteristics of a system composed of a rocket engine, supersonic diffuser, and ejector system.
Chae-Hyoung Kim, Chang-Su Park
doaj   +1 more source

Fail‐Controlled Classifiers: A Swiss‐Army Knife Toward Trustworthy Systems

Software: Practice and Experience, EarlyView.
ABSTRACT Background Modern critical systems often require to take decisions and classify data and scenarios autonomously without having detrimental effects on people, infrastructures or the environment, ensuring desired dependability attributes. Researchers typically strive to craft classifiers with perfect accuracy, which should be always correct and ...
Fahad Ahmed Khokhar, Tommaso Zoppi, Andrea Ceccarelli, Leonardo Montecchi, Andrea Bondavalli   +4 more
wiley   +1 more source

Cryogenic gear technology for an orbital transfer vehicle engine and tester design [PDF]

Technology available for gears used in advanced Orbital Transfer Vehicle rocket engines and the design of a cryogenic adapted tester used for evaluating advanced gears are presented.
Calandra, M., Duncan, G.
core   +1 more source

The Fission Fragment Rocket Engine for Mars Fast Transit [PDF]

, 2023
J.M. Gahl, Andrew Gillespie, Cuikun Lin, R. V. Duncan   +3 more
openalex   +1 more source

Numerical Prediction of Deformation‐Induced Martensitic Transformation in Cold‐Sprayed Austenitic Stainless Steel

steel research international, EarlyView.
Cold spray deposition of stainless steel (grade: SS304) is evaluated for marine applications, with emphasis on martensitic transformation during impact. Analytical modeling, simulations, and experiments reveal that helium‐assisted spraying of fine powders promotes cooling below the martensitic start temperature, enabling up to ≈40% austenite to ...
Cal Vin Wong, K. R. Ramkumar, Sougata Roy, Victor K. Champagne, John J. Lee   +4 more
wiley   +1 more source

Summary of combustion instability research at Princeton University, 1969 [PDF]

Control and causes of combustion instability in rocket ...
Bracco, P. V., Bruno, C., Chervinsky, A. P., Crocco, L., Harrje, D. T., Rosfjord, T. J., Sirignano, W. A., Tang, P. K., Tien, J. S., Tonon, T. S., Varma, A. K., Wood, J. S.   +11 more
core   +1 more source

Conceptual Mechanical Design for a Fast Energy Spectrum Nuclear Rocket Engine

, 1965
C. Hussey, O. Woike, Jochen Zwick
openalex   +1 more source

Development Advances in Liquid Rocket Engines Turbopump: A Review

, 2023
Rahul Singhal, Clevin Toppo, Pratap Roy, Rupak Biswakarma, Sristy Sahu, Ujjal Kalita   +5 more
openalex   +1 more source