Results 141 to 150 of about 3,183,819 (383)

Numerical Simulation and Aerodynamic Optimization of Two-Stage Axial High-Pressure Turbine Blades [PDF]

arXiv
Gas turbine engines are highly efficient and powerful because of their high-pressure turbines (HPTs). Furthermore, stationary blades shape and prepare high-pressure gas for efficient utilization by moving blades. Consequently, optimizing the geometric features of both stationary and moving blades during the first and second stages of HPT is necessary ...
arxiv  

Closing the Carbon Cycle in Plasma‐Based CO2 Splitting – A Techno‐Economic Perspective

Chemie Ingenieur Technik, EarlyView.
This techno‐economic analysis examines the influence of CO₂ supply costs on plasma‐based power‐to‐liquid systems. In three defined scenarios for further plasma development, net production costs of marine diesel between 2.6 and 3.7 EUR L−1 are achieved. Cheaper green electricity could reduce these net production costs to 1.6 EUR L−1.
Samuel Jaro Kaufmann, Paul Rößner, Kai Peter Birke   +2 more
wiley   +1 more source

Experimental Thrust and Specific Impulse Analysis of Pulsed Detonation Combustor

Applied Sciences
Detonation combustion represents a significant advancement in efficiency over traditional deflagration methods. This paper presents a Pulsed Detonation Combustor (PDC) model that is designed with an aerodynamic mixing chamber featuring Hartmann–Sprenger ...
Andrei Vlad Cojocea, Ionuț Porumbel, Mihnea Gall, Tudor Cuciuc   +3 more
doaj   +1 more source

Discussion: “Design and Development of a Broad-Range, High-Efficiency Centrifugal Compressor for a Small Gas-Turbine-Compressor Unit” (Speer, Ivan E., 1953, Trans. ASME, 75, pp. 395–404) [PDF]

, 1953
J. D. Stanitz
openalex   +1 more source

Additives in Biphasic Hydroformylation: An Analysis of the Influence of the Interfacial Area

Chemie Ingenieur Technik, EarlyView.
Optimizing homogeneous biphasic hydroformylation offers significant potential for improving chemical efficiency by use of additives or by investigating different stirrer and reactor designs. Traditionally, efforts have focused on conversion rates and selectivity, but advanced techniques such as high‐pressure borescopy now allow detailed in‐situ ...
Frederike S. Heinen, Jeroen T. Vossen, Andreas J. Vorholt   +2 more
wiley   +1 more source

Root causes for corrosion on painted steel structures in marine environments

Materials and Corrosion, EarlyView., 2023
Marine steel structures protected by organic coatings start to corrode when the coating fails. This investigation shows that most of the corrosion attacks found on four different structures were related to weaknesses in the coating related to the application. Low film thickness over edges and welds accounts for more than 50% of the corrosion attacks on
Ole Ø. Knudsen, Catalina H. M. Hagen, Anders W. B. Skilbred, Tarjei K. Bruaas, Jarand Nærland   +4 more
wiley   +1 more source

Development and Testing of a Helicon Plasma Thruster Based on a Magnetically Enhanced Inductively Coupled Plasma Reactor Operating in a Multi-Mode Regime

Applied Sciences
A disruptive Electric Propulsion system is proposed for next-generation Low-Earth-Orbit (LEO) small satellite constellations, utilizing an RF-powered Helicon Plasma Thruster (HPT).
Anna-Maria Theodora Andreescu, Daniel Eugeniu Crunteanu, Maximilian Vlad Teodorescu, Simona Nicoleta Danescu, Alexandru Cancescu, Adrian Stoicescu, Alexandru Paraschiv   +6 more
doaj   +1 more source

CO2‐Based Fischer‐Tropsch Synthesis Toward Aviation Fuel Components Using a Na‐Promoted Fe Catalyst

Chemie Ingenieur Technik, EarlyView.
A Na‐promoted Fe catalyst was investigated to produce liquid hydrocarbons using CO2‐based Fischer‐Tropsch synthesis. As a result of a systematic variation of operation parameters, 49 wt % of the organic liquid was promising as sustainable aviation fuel. Abstract The CO2‐based Fischer‐Tropsch synthesis toward liquid hydrocarbons was investigated using a
Christian Schmidt, Hendrik Wollmerstädt, Sven Kureti   +2 more
wiley   +1 more source

Operating Characteristics of a Wave-Driven Plasma Thruster for Cutting-Edge Low Earth Orbit Constellations

Inventions
This paper outlines the development phases of a wave-driven Helicon Plasma Thruster for cutting-edge Low Earth Orbit (LEO) constellations. The two-stage ambipolar electric propulsion (EP) system combines the efficient ionization of an ultra-compact ...
Anna-Maria Theodora Andreescu, Daniel Eugeniu Crunteanu, Maximilian Vlad Teodorescu, Simona Nicoleta Danescu, Adrian Stoicescu, Alexandru Cancescu, Alexandru Paraschiv   +6 more
doaj   +1 more source

Pressure gain combustion for gas turbines: Analysis of a fully coupled engine model [PDF]

arXiv
The ``Shockless Explosion Combustion" (SEC) concept for gas turbine combustors, introduced in 2014, approximates constant volume combustion (CVC) by harnessing acoustic confinement of autoigniting gas packets. The resulting pressure waves simultaneously transmit combustion energy to a turbine plenum and facilitate the combustor's recharging against an ...
arxiv