... ( d ) for an incoming traveling wave f . Each function T ( d ) ( ω ) is the transmitted Riemann invariant from one can to a can that is d cans apart. For example, T (0) is the reflection of a wave propagating downstream of one can and being reflected to the same can, and T (3) can...

... received January 18, 2018; published online July 30, 2018. Assoc. Editor: David L. S. Hung. 26 11 2016 18 01 2018 Internal combustion engines Unsteady flows Wave propagation Mechanical, hydraulic, and electromagnetic systems all react in their own typical ways, when subjected...

... Aerothermodynamics Gas turbine technology Internal flow Wave propagation A wave rotor accomplishes compression and expansion in the same mechanical component. It operates in a gas turbine as the topping stage (Fig. 1( a ) ), and enhances the engine performance by increasing the overall pressure ratio...

... Underground injection Wave propagation Underground storage 15 03 2018 30 04 2018 Contributed by the IC Engine Division of ASME for publication in the J OURNAL OF E NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received March 15, 2018; final manuscript received April 30...

... Thermoacoustics Unsteady flows Wave propagation Flow induced noise Increased aircraft operations combined with urban densification around airports lead to the definition of more and more severe environmental regulations [ 1 ]. As the dominant noise sources for an aircraft engine, jet and fan noise...

... ) ) ︸ FTF measured ( ω ) ( 1 + Δ G ) exp   ( − i Δ ϕ ) Thermoacoustics Wave propagation Thermoacoustic instabilities are a major threat for modern gas turbines [ 1 ]. One approach to assess thermoacoustic stability is the use of large eddy simulation [ 2 , 3...

... these modal growth rates—as well as individual contributions due to flame driving and acoustic damping mechanisms—from measurement data is of high practical relevance due to the following reasons. Combustion Modeling Thermoacoustics Unsteady Wave propagation Future work comprises...

... conversion Flame Fuel combustion Fuels Gas turbine technology Gaseous Measurement techniques Sensors Swirling Thermoacoustics Thermodynamics Turbulence Turbulent Unsteady Unsteady flows Visualization Wave propagation Coupled behavior Combustion Avoidance of thermoacoustically...

... 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 late in the development of the engine, which makes them complicated and expensive...

... October 18, 2016. Editor: David Wisler. 29 06 2016 28 07 2016 Combustors Experimental Gas turbine technology Nonintrusive diagnostics Temperature Thermoacoustics Wave propagation The operational range of today's gas turbine combustors is limited by their sensitivity...

... Measurement techniques Wave propagation One of the most intriguing challenges in the turbomachinery field is the 3D experimental reconstruction of the unsteady flows during a machine revolution. Not only would this measurement allow an in-depth understanding of the operating conditions of the machine...

..., the amplitudes increase and may lead to a burst of vibration. The impact of rotational acceleration has been tested but no influence has been observed in this case. This is no longer verified when wear is introduced. Finite element methods Structural dynamics Vibration Wave propagation...

... Aerothermodynamics Gas turbine technology Modeling Thermodynamics Unsteady flows Wave propagation A wave rotor pressure exchanger can be used as a topping cycle for a gas turbine, and can enhance the power cycle performance with its internal pressure exchange. In a wave rotor, the heated gas from...

... Power systems Unsteady Wave propagation NEMS Many systems and processes employ pressurized liquid media such as water, oil, fuel, and hydraulic fluid. Mechanical pumps pressurize and move such liquid media in fluid power systems. In the aerospace industry specifically, the pumps employed...

... in nonuniform mean flow environments in terms of wave propagation and damping. The corresponding ROM accurately reconstructs this behavior as demonstrated by a validation test case utilizing the scattering behavior of an orifice tube subjected to a subsonic mean flow as the experimental benchmark...

... modes wave propagation finite element analysis mechanical testing The design and analysis of nominally cyclic structures such as bladed disks is often done under the assumption that the structure as a whole is comprised of perfectly identical substructures, or sectors. This assumption...