Stability Analysis of the Boundary Layer Developing on a Flat Plate with Discrete Roughness Elements in Hypersonic Flow

Montero, Iván Padilla; Pinna, Fabio

doi:10.2514/6.2018-1079

Cited by 1 publication

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main difference with the aforementioned studies is that the aim is to decrease certain losses not to control the flow to directly influence power generation. In [4][5][6][7][8][9][10], the authors introduced an injection method in order to accelerate the flow on the suction side of the blade in order to reduce or eliminate the flow detachment at different Reynolds numbers. The results showed that through injecting a fluid in these regions the flow detachment process can be delayed.…”

Section: Introductionmentioning

confidence: 99%

Internal Flow Characteristics of Novel Turbine Performance Enhancement Method through Specific Fluid Injection

Nicoara,

Crunteanu,

Vilag

2023

Applied Sciences

View full text Add to dashboard Cite

Gas turbine engines are an essential component for many industries, such as aerospace, marine propulsion, energy generation, etc., with modern engines capable of achieving high powers, efficiencies and reliability. However, these high performances are achieved on a narrow interval of working regimes; when operating at partial loads, a drastic decrease in performance is expected. In order to mitigate this drawback, a novel injection method has been proposed to improve axial turbine and gas turbine engine performance at these regimes. The method consists of the injection of a fluid in specific sections of turbine vanes to accelerate the flow, modify the velocity triangles and increase the generated power at partial loads. In this paper, the authors discuss the internal flow characteristics of the injection channels using numerical studies to determine the flow fields for different working regimes. The results show that the power generated by the rotor can be improved by 10% to 21% for different operating regimes without considering the internal geometries. The introduction of internal flow configurations led to smaller improvements in power generation, obtaining injection system pressure losses of between 10% and 20%. The paper concludes that the flow through channels is not uniform, with smaller dimensions of the internal geometries leading to higher pressures and an increased influence of the injection system.

show abstract