Minimization of Pressure Fluctuations in an Axial Turbine Stage Under Periodic Inflow Conditions

Topalovic, Daniel; Wolff, Sascha; Heinrich, Alexander; Peitsch, Dieter; King, Rudibert

doi:10.2514/6.2019-4213

Cited by 6 publications

(1 citation statement)

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“…Modifying the turbine blades to account for supersonic inlet flow is one possible approach [8]. Also utilizing an additional device such as a plenum chamber between the PDCs and the turbine is currently the subject of research [9]. The main purpose of this device is to minimize the turbine inlet flow fluctuations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Exhaust Flow of a Pulse Detonation Combustor at different Operating Conditions based on High-Speed Schlieren and PIV

Haghdoost

Edgington-Mitchell²,

Paschereit

et al. 2019

AIAA Scitech 2019 Forum

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The exhaust flow of a Pulse Detonation Combustor (PDC) is investigated for different operating conditions. The PDC consists of two units, the deflagration to detonation transition section and the exhaust tube with a straight nozzle. High-speed high-resolution schlieren images visualize the shock dynamics downstream of the nozzle. The flow dynamics during one full PDC cycle is examined via high-speed Particle Image Velocimetry. A well-suited solid tracer particle for supersonic reactive flow is determined in a preliminary study to minimize the PIV measurement error. The investigated operating conditions of the PDC differ in fillfraction, which is the percentage of the tube filled with a reactive mixture. With increasing fill-fraction, the flow features grow in size and strength, as the propagation velocity of the leading shock increases. The blow down process of the PDC is characterized by several exhaust and suction phases. An increase in fill-fraction results in a stronger first exhaust phase, while the subsequent suction and exhaust phases remain almost unaffected.

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Section: Introductionmentioning

confidence: 99%