... September 17, 2018. Editor: Jerzy T. Sawicki. 25 06 2018 26 06 2018 Aeronautical propulsion Combustion Gas turbine technology Unsteady flows Aerospace Propulsion systems In Europe's H2020 program, the ULTIMATE project [ 1 ] is developing concepts for the next generation...

... Finite element Flow induced vibration Fuels Modeling Periodic Thermoacoustics Unsteady Unsteady flows Vibration Wave propagation Flow induced noise Combustion Can-annular combustors are common in heavy-duty land based gas turbines. In this design, the air flows from the compressor...

... , “ On the Physics of Flow Separation along a Low Pressure Turbine Blade Under Unsteady Flow Conditions ,” ASME J. Fluids Eng. , 127 ( 3 ), pp. 503 – 513 . 10.1115/1.1905646 [23] Wissink , J. , 2003 , “ DNS of Separating, Low Reynolds Number Flow in a Turbine Cascade With Incoming Wakes ,” Int. J...

... ], industrial combustion systems such as internal combustion engines and gas turbine combustors [ 4 ], and building fires [ 5 ]. Burners Combustion Combustors Computational fluid dynamics Flame Fuel combustion Gas turbine technology Heat transfer Modeling Turbulence Turbulent Unsteady flows...

.... 18 02 2018 18 02 2018 Aerodynamics Unsteady flows The appearance of rotating stall in compressors is a sign of instability and performance deterioration. Many studies were introduced to clarify the ambiguity of rotating stall and to provide efficient ways to overcome it [ 1...

... installed in engines are typically subject to unsteady flows, which are characterized by periodic variations in Mach number and temperature caused by the wakes shed from upstream blades. The present work examines the impact of this periodic unsteadiness on stagnation temperature measurements by translating...

... and Identification of a Gasoline Common Rail Injection System,” SAE Paper No. 2014-01-0196. 10.4271/2014-01-0196 [28] Ferrari , A. , and Pizzo , P. , 2015 , “ Optimization of an Algorithm for the Measurement of Unsteady Flow-Rates in High-Pressure Pipelines and Application of a Newly Designed...

..., 2017; final manuscript received March 1, 2018; published online July 30, 2018. Editor: David Wisler. 14 11 2017 01 03 2018 Aerodynamics Structural dynamics Unsteady flows During the commissioning and stand-still cycles of wind turbines, the rotor is often stopped or even...

... received August 2, 2017; final manuscript received August 29, 2017; published online July 5, 2018. Assoc. Editor: Riccardo Da Soghe. 02 08 2017 29 08 2017 Acoustic emission Energy Flow induced vibration Modeling Thermoacoustics Unsteady flows Wave propagation Flow induced noise...

... Gas turbine technology Thermoacoustics Turbulence Unsteady flows The multiscale nature of combustion dynamics and their coupling mechanisms makes the experimental investigation of the phenomena challenging. High thermal power density flames present in gas turbine combustors are naturally...

..., where the SAS model shows difficulty in capturing the unsteady flow in the vortex shedding region. On the contrary, LES shows significant improvement, and the validation error is 1.6%. The maximum validation error is obtained in the runner at R2, where the SAS and the LES present errors of 8.9% and 3...

... vortex and pressure waves. After that, POD study of the wake behavior was carried out. The results indicate that the shedding vortex is dominant in the unsteady flow. The phase relation between the pressure side wake vortex (PSVP) and the suction side wake vortex (SSVP) is confirmed. In summary...

.... 09 11 2017 12 12 2017 Burners Combustion Combustors Experimental Flame Nonintrusive diagnostics Thermoacoustics Unsteady Unsteady flows Increasingly stringent pollutant emission regulations lead aircraft engine manufacturers to move away from traditional diffusion flame...

... properties of a combustion system. Nevertheless, the PVC can lead to an increase of turbulence and therefore may improve mixing [ 3 ]. For these and other reasons, the PVC has increasingly been in the focus of research during the last years. Finite element Jets Shear Flows Turbulence Unsteady...

... of the linearized model in the frequency domain. The nature of the approximations introduced in the fan representation is such that numerical solutions can be computed inexpensively, while the main feature of the flow in the fan passage, namely the shock system and an approximation of the unsteady flow encountered...

... Unsteady flows Aerospace Propulsion systems Combustion For the fulfilment of pollutant emission limitations required for the next generation of civil aero-engines, lean burn combustion appears as one of the most promising technologies. Differently from current rich quench lean technology...

... . https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19970008124.pdf [16] CD-Adapco , 2016 , “ STAR-CCM+ Documentation, Version 11.04 ,” CD-Adapco, Melville, NY. [17] Reese , H. , and Carolus , T. , 2008 , “ Axial Fan Noise: Towards Sound Prediction Based on Numerical Unsteady Flow...

... Thermoacoustics Thermodynamics Turbulence Turbulent Unsteady Unsteady flows Visualization Wave propagation Coupled behavior Combustion Avoidance of thermoacoustically driven pressure pulsations at screech level frequencies presents a considerable engineering challenge in the development of modern...

... 07 2017 08 08 2017 Combustion Combustors Experimental Flame Jets Measurement techniques Nonintrusive diagnostics Shear Flows Turbulent Unsteady flows Visualization High momentum jet stabilized combustion systems provide an interesting alternative for gas turbines...

... dynamics Convection Engines Flame Modeling Swirling Thermoacoustics Unsteady flows Wave propagation Coupled behavior Combustion instabilities (CI) are a serious concern in the design process of aeronautical engines. They are still hard to predict and, as a consequence, generally appear...