Results 51 to 60 of about 256,299 (389)

Seal Related Development Activities at EG/G [PDF]

, 1991
Seal related development activities including modeling, analysis, and performance testing are described for several current seal related projects.
Greiner, Harold F.
core   +1 more source

Improving Cyclic Oxidation Resistance of Additively Manufactured IN939 Superalloy via Chemical Vapor Aluminizing

Advanced Engineering Materials, Volume 27, Issue 7, April 2025.
This study investigates the effect of a NiAl coating on additively manufactured (AM) IN939 to improve its cyclic oxidation resistance at 1050 °C. The coating promotes protective α‐Al2O3 formation, allowing durability for up to 240 cycles, while uncoated AM‐IN939 experiences spallation and weight loss due to nonprotective oxides.
Fatih Guler, Ahmet Arda Inceyer, Seda Kol, Metin Usta, Huseyin Aydin, Ozgul Keles   +5 more
wiley   +1 more source

Test Stand for Microjet Engine Prototypes

Machines
To investigate the functionality and performance of a prototype microjet engine, we constructed a versatile test stand tailored to the specifications of a 400 N prototype.
Cornel Mihai Tărăbîc, Grigore Cican, Cristian Olariu, Gabriel Dediu, Răzvan Marius Catană   +4 more
doaj   +1 more source

Functional Recycling and Reuse of Nd–Fe–B Permanent Magnets from Various Waste Streams for a more Sustainable and Resilient Electromobility

Advanced Engineering Materials, Volume 27, Issue 7, April 2025.
Due to the increasing demand and growing importance of resilient and sustainable supply chains, the use of recycled and reused Nd–Fe–B magnets in e‐mobility applications such as Pedelecs, e‐Scooters, and Hoverboards is being investigated. It can be shown that the corresponding motors with recycled magnets do not exhibit any loss of performance while at
Mario Schönfeldt, Konrad Opelt, Mahmudul Hasan, Michael Gröninger, Dennis Jahnke, Jürgen Gassmann, Oliver Gutfleisch   +6 more
wiley   +1 more source

Operation regimes in a rotating detonation combustor [PDF]

INCAS Bulletin
This paper presents an exploration of the operational envelope of a Rotating Detonation Combustor based on the design of the research group at the University of Southampton.
George Ionut VRABIE, Daniel C. ASOLTANEI, Andrei V. COJOCEA, Mihnea GALL, Ionut PORUMBEL, Alexa CRISAN   +5 more
doaj   +1 more source

On a New Type of Combined Solar–Thermal/Cold Gas Propulsion System Used for LEO Satellite’s Attitude Control

Applied Sciences, 2020
This paper presents the development, construction and testing of a new type of solar–thermal propulsion system which can be used for low earth orbit (LEO) satellites.
Constantin Sandu, Valentin Silivestru, Grigore Cican, Horațiu Șerbescu, Traian Tipa, Andrei Totu, Andrei Radu   +6 more
doaj   +1 more source

Analytical Calculation Model of the TV3-117 Turboshaft Working Regimes Based on Experimental Data

Applied Sciences, 2023
The paper presents a practical and relevant analytical calculation model for free turbine turboshaft working regimes and engine performance. The analytical calculation model is based on a post-processing method that analyzes a series of experimental data,
Razvan Marius Catana, Gabriel Dediu
doaj   +1 more source

Challenges in the Development of Micro Gas Turbines for Concentrated Solar Power Systems [PDF]

, 2016
Parabolic solar dish systems have gained more interest recently as a reliable way for harnessing the solar power in form of electricity. Micro gas turbines can be usedas engines in such system to convert the heat available from the solar
Al Zaili, J., Sayma, A. I.
core  

Coercivity Improvement in Ce‐Containing (Nd,Pr)‐Fe‐B‐Based Sintered Magnets by Application of the 2‐Powder Method

Advanced Engineering Materials, EarlyView.
This study investigates the magnetic properties and microstructures of 2PM‐manufactured Ce‐containing (Nd,Pr)‐Fe‐B magnets. The addition of Nd and Dy significantly enhances coercivity by 25% and 81%, respectively, attributed to core‐shell structures.
Chi‐Chia Lin, Konrad Opelt, Jürgen Dieter Rossa, Fernando Maccari, Songhak Yoon, Jürgen Gassmann, Oliver Gutfleisch   +6 more
wiley   +1 more source

Satellite Thermal Management Pump Impeller Design and Optimization

Inventions
This study presents a numerical approach to the design and optimization of centrifugal impellers used in the pumps of active thermal control systems of spacecraft.
Valeriu Drăgan, Oana Dumitrescu, Cristian Dobromirescu, Ionuț Florian Popa   +3 more
doaj   +1 more source