Search Results - "Ali, Gülhan"

Experimental investigation of heating augmentation by particle kinetic energy conversion in dust-laden supersonic flows by Allofs, Dirk, Neeb, Dominik, Gülhan, Ali

“…The presence of particles in supersonic flows can cause significant increases in stagnation point heat fluxes (Dunbar et al. in AIAA J 13:908–912, 1975). This…”
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Aerodynamic characteristics of the retro propulsion landing burn of vertically landing launchers by Marwege, Ansgar, Gülhan, Ali

“…In the frame of the European funded H2020 project RETALT (retro propulsion-assisted landing technologies), the unsteady aerodynamics of vertically descending…”
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Velocity measurements in particle-laden high-enthalpy flow using non-intrusive techniques by Salvi, Ciro, Gülhan, Ali

“…This research aims at analysing the particle-laden flow of the hypersonic high-enthalpy wind tunnel L2K, situated in Köln at the German Aerospace Center (DLR)…”
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Characterization of a hypersonic turbulent boundary layer along a sharp cone with smooth and transverse square−bar roughened wall by Neeb, Dominik, Marquardt, Pascal, Gülhan, Ali

“…In the present study, the response of a hypersonic turbulent boundary layer at an inflow of Ma ∞  = 6 and Re ∞  = 16·10 6 1/m to a smooth and rough surface…”
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Aerodynamic interactions of blunt bodies free-flying in hypersonic flow by Seltner, Patrick M., Willems, Sebastian, Gülhan, Ali

“…This paper takes a new look at how the aerodynamic interactions of multiple bodies in high-speed flow affect their motion behaviors. The influence of the body…”
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Particle mass flow determination in dust-laden supersonic flows by means of simultaneous application of optical measurement techniques by Allofs, Dirk, Neeb, Dominik, Gülhan, Ali

“…Particle mass flow rate and particle mass concentration are key parameters for describing two-phase flows, especially for particle-induced heating augmentation…”
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Shock interaction induced heat flux augmentation in hypersonic flows by Gülhan, Ali, Willems, Sebastian, Neeb, Dominik

“…This paper gives a summary of dedicated experiments on the shock interaction induced heat flux augmentation, by means of tests carried out in the hypersonic…”
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Simultaneous determination of particle size, velocity, and mass flow in dust-laden supersonic flows by Allofs, Dirk, Neeb, Dominik, Gülhan, Ali

“…The particle mass concentration and -mass flow rate are fundamental parameters for describing two-phase flows and are products of particle number, -size,…”
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Combined Instrumentation Package COMARS+ for the ExoMars Schiaparelli Lander by Gülhan, Ali, Thiele, Thomas, Siebe, Frank, Kronen, Rolf

“…In order to measure aerothermal parameters on the back cover of the ExoMars Schiaparelli lander the instrumentation package COMARS+ was developed by DLR…”
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On the subsonic near-wake of a space launcher configuration without jet: Experimental investigation by means of particle image velocimetry (PIV) on the subsonic (Mach 0.5 to 0.9) near-wake flow of a space launcher configuration by Saile, Dominik, Kühl, Viktor, Gülhan, Ali

“…Wake flows have been extensively investigated in the past mainly with the objective to reduce drag. The failure of Ariane 5 Flight 157 though revealed that the…”
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On subsonic near-wake flows of a space launcher configuration with various base geometries by Saile, Dominik, Kühl, Viktor, Gülhan, Ali

“…Buffet/buffeting as load imposing mechanism on the base structures of space launcher has been of strong interest ever since it was found as partially…”
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Experiments on a smooth wall hypersonic boundary layer at Mach 6 by Neeb, Dominik, Saile, Dominik, Gülhan, Ali

“…The turbulent boundary layer along the surface of high-speed vehicles drives shear stress and heat flux. Although essential to the vehicle design, the…”
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Capsule aerodynamics and shock-wave boundary layer interaction (SBLI) in supersonic and transonic flow by Gawehn, Thomas, Schleutker, Thorn, Gülhan, Ali

“…Static force and moment measurements are performed on the MarcoPolo-R aero shape in the trisonic wind tunnel TMK. The static stability behaviour of the capsule…”
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Hypersonic retro propulsion for reusable launch vehicles tested in the H2K wind tunnel by Marwege, Ansgar, Kirchheck, Daniel, Klevanski, Josef, Gülhan, Ali

“…In the frame of the RETALT (RETro propulsion Assisted Landing Technologies) project, the aerodynamics of reusable launch vehicles reentering the atmosphere and…”
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On the subsonic near-wake of a space launcher configuration with exhaust jet by Saile, Dominik, Kühl, Viktor, Ali Gülhan

“…The Ariane 5 failure flight 157 made clear that the loads in the base region of space launcher configurations were underestimated and its near-wake dynamics…”
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Plume and wall temperature impact on the subsonic aft-body flow of a generic space launcher geometry by Kirchheck, Daniel, Schumann, Jan-Erik, Fertig, Markus, Saile, Dominik, Hannemann, Volker, Eggers, Thino, Gülhan, Ali

“…Experimental and numerical simulation of launcher base flows are crucial for future launcher design. In experiments, exhaust plume simulation is often limited…”
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Retro propulsion assisted landing technologies: the RETALT project by Gülhan, Ali, Marwege, Ansgar, Vos, Jan

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Lifespan regulation by targeting heme signaling in yeast by Patnaik, Praveen K., Nady, Nour, Barlit, Hanna, Gülhan, Ali, Labunskyy, Vyacheslav M.

“…Heme is an essential prosthetic group that serves as a co-factor and a signaling molecule. Heme levels decline with age, and its deficiency is associated with…”
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Wind tunnel experiments of interstage segments used for aerodynamic control of retro-propulsion assisted landing vehicles by Marwege, Ansgar, Hantz, Christian, Kirchheck, Daniel, Klevanski, Josef, Gülhan, Ali, Charbonnier, Dominique, Vos, Jan

“…In the RETALT (RETro propulsion Assisted Landing Technologies) project vertical landing launcher configurations are investigated. In the aerodynamic phase of…”
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Aerodynamics of inclined cylindrical bodies free-flying in a hypersonic flowfield by Seltner, Patrick M., Willems, Sebastian, Gülhan, Ali, Stern, Eric C., Brock, Joseph M., Aftosmis, Michael J.

“…The influence of the flight attitude on aerodynamic coefficients and static stability of cylindrical bodies in hypersonic flows is of interest in understanding…”
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