Results 21 to 30 of about 7,302 (245)

Numerical approach to the modelling of transient interaction of prospective combustor concepts and conventional high pressure turbines

Propulsion and Power Research, 2019
The Institute of Gas Turbines and Aerospace Propulsion at Technische Universität Darmstadt conducts research projects in the field of “combustor turbine interaction” (CTI). This paper presents numerical studies on the interaction between novel combustion
F. Bakhtiari, H.-P. Schiffer
doaj   +1 more source

The impact of film cooling on the heat release within a rotating detonation combustor

Applications in Energy and Combustion Science
Rotating detonation combustors establish a detonation wave that continuously circulates inside a small annulus. The presence of the detonation wave and the downstream oblique shock within the small annulus coupled with high mass flow induces a high heat ...
Shreyas Ramanagar Sridhara, Antonio Andreini, Marc D. Polanka, Myles D. Bohon   +3 more
doaj   +1 more source

Benefits and Challenges of Pressure-Gain Combustion Systems for Gas Turbines [PDF]

Mechanical Engineering, 2009
This article discusses benefits and challenges of Pressure-Gain Combustion Systems for Gas Turbines. The article also highlights that one approach to substantially improve gas turbine thermal efficiency is to replace the nearly constant pressure combustion process with some form of pressure-gain heat release such as either a constant volume or ...
Chris Brophy, Gabriel Roy
openaire   +1 more source

Effects of Key Inlet Design Parameters on the Performance of Supplementary Combustion Nozzle [PDF]

Journal of Applied Fluid Mechanics
Solid rocket motors (SRMs) have limited propulsion performance due to their short fuel combustion duration and low specific impulse. The supplementary combustion nozzle (SCN) injects air into the nozzle expansion section to promote secondary combustion ...
W. Lei, Y. Li, Q. Liu, Z. Zhou
doaj   +1 more source

Numerical Study of a Direct Injection Internal Combustion Engine Burning a Blend of Hydrogen and Dimethyl Ether

Drones, 2018
In the reported study, various aspects of dimethyl ether/hydrogen combustion in a Reactivity Controlled Compression Ignition (RCCI) engine are numerically evaluated using Reynolds Averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES).
Galia Faingold, Leonid Tartakovsky, Steven H. Frankel   +2 more
doaj   +1 more source

Ignition and Combustion Characteristics of N-Butanol and FPBO/N-Butanol Blends With Addition of Ignition Improver

Frontiers in Energy Research, 2022
In this study, the ignition and combustion characteristics of fast pyrolysis bio-oil (FPBO) are investigated in a combustion research unit (CRU), which mainly consists of a constant-volume combustion chamber.
Yu Wang, Jinlin Han, Noud Maes, Michel Cuijpers, Bart Somers   +4 more
doaj   +1 more source

Exploring the deflagration-autoignition-detonation transition in the context of pressure gain combustion

Joint Meeting of International Workshop on Detonation for Propulsion (IWDP) and International Constant Volume and Detonation Combustion Workshop (ICVDCW), 2022
Autoignition of hot spots can develop into a detonation under certain conditions. Detonations must be suppressed in Constant Volume Combustion and promoted in Rotating Detonation Combustion.
Ezekwesili, Roseline, Strozzi, Camille, Bellenoue, Marc, Bohon, Myles   +3 more
openaire   +5 more sources

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source