GAS TURBINE COMBUSTION—Alternative Fuels and Emissions

Lefebvre, A. H.; Ballal, Dillip R.; Bahr, D. W.

doi:10.1115/1.4001927

Cited by 110 publications

(114 citation statements)

References 0 publications

Supporting

Mentioning

111

Contrasting

Unclassified

Order By: Relevance

“…To the left Frank Whittle's combustor, to the right combustor of JUMO 004 engine [5] Since that the development has been continuous but without major breakthrough. Until the 1970s the designers of combustors were fully occupied with providing stable operation, low pressure loss and high burner efficiency, however, unfortunately, the last two are in antagonistic relation with each other.…”

Section: Figmentioning

confidence: 99%

Gas Turbine Engine Combustors and the Estimation of Their Pressure Loss

Varga¹,

ÓVÁRI²,

Kavas³

2017

AFASES 2017

View full text Add to dashboard Cite

show abstract

Section: Figmentioning

confidence: 99%

Gas Turbine Engine Combustors and the Estimation of Their Pressure Loss

Varga¹,

ÓVÁRI²,

Kavas³

2017

AFASES 2017

View full text Add to dashboard Cite

show abstract

“…Regarding the graph at Q th,n = 100% the CO concentrations decrease from 50 ppm at λ overall = 1.8 to 24 ppm at λ overall = 2.42 followed by a rise up to 58 ppm at λ overall = 2.8. In the left hand branch of the CO curves the trend of the measured concentrations follow the trend of the equilibrium conditions which decrease for higher air numbers [19]. The right hand branch, however, is dominated by non-equilibrium effects [20].…”

Section: Exhaust Gas Emissionsmentioning

confidence: 99%

Experimental Investigation of the Influence of Combustor Cooling on the Characteristics of a FLOX©-Based Micro Gas Turbine Combustor

Zanger¹,

Thomas²,

Aigner³

2013

Progress in Gas Turbine Performance

View full text Add to dashboard Cite

“…Wskazano na problem zakłóceń dotyczących pomiaru i przetwarzania danych. SŁOWA KLUCZOWE: otwory efuzyjne, triangulacja laserowa, wizja maszynowa, pomiary optyczne Efficiency and environmental performance of jet aircraft engines depends mainly on the temperature of the combustion [9]. For highest temperature of combustion, their elements are manufactured from monocrystalline materials, super-alloys or ceramic-metal composite structures.…”

unclassified

“…Efficiency and environmental performance of jet aircraft engines depends mainly on the temperature of the combustion [9]. For highest temperature of combustion, their elements are manufactured from monocrystalline materials, super-alloys or ceramic-metal composite structures.…”

mentioning

confidence: 99%

Triangulation methods for effusion holes measurements in combustion chambers of aircraft engines

2017

View full text Add to dashboard Cite

An important problem of modern aero-engines' construction is effective cooling of combustor liner attained by effusion holes. The laser-drilled channels are a critical metrological challenge resulting from their small diameter (below 1 mm), irregular shape and angular orientation to the surface. Hence, in this case, the tactile CMM measurement methods are timeconsuming, error-susceptible and hazardous to the measuring stylus. The paper compares two methods of triangulation scanning of the surface of the engine combustion chamber with angular effusion holes (according to normal to surface and coaxially with hole). Additionally, four algorithms for processing measurement data were developed and evaluated, aiming at determination of the position and holes diameter. The paper also discusses the problem of measurement and calculation disturbance. KEYWORDS: effusion holes, laser triangulation, machine vision, optical measurement Ważnym problemem dotyczącym konstrukcji nowoczesnych turboodrzutowych silników lotniczych jest efektywne chło-dzenie komór spalania, realizowane poprzez otwory efuzyjne. Kanały takie, drążone laserowo, stanowią jednak poważne wyzwanie metrologiczne ze względu na niewielką średnicę (poniżej 1 mm), nieregularny kształt i kątową orientację względem powierzchni. Pomiary metodami kontaktowymi CMM są więc czasochłonne, obarczone znaczną niepewnością pomiaru oraz ryzykiem uszkodzenia trzpienia pomiarowego. W artykule porównano dwie metody skanowania triangulacyjnego powierzchni komory spalania silnika z kątowymi otworami efuzyjnymi (w kierunku normalnym do powierzchni oraz współo-siowo z otworem). Ponadto oceniono cztery opracowane algorytmy przetwarzania danych pomiarowych, których celem jest wyznaczenie położenia i średnicy otworów. Wskazano na problem zakłóceń dotyczących pomiaru i przetwarzania danych. SŁOWA KLUCZOWE: otwory efuzyjne, triangulacja laserowa, wizja maszynowa, pomiary optyczne Efficiency and environmental performance of jet aircraft engines depends mainly on the temperature of the combustion [9]. For highest temperature of combustion, their elements are manufactured from monocrystalline materials, super-alloys or ceramic-metal composite structures. In addition, the thin air film is formed just off the walls of the internal thermal barriers. This film is obtained by forcing air through the effusion holes. For homogeneous distribution of the pressure, as possible without turbulence areas, axes of the holes shall be at an acute angle to the surface [10]. However, manufacturing and measuring such holes with diameters 0.5÷0.8 mm is a real technological challenge. Due to a high process performance, laser drilling is applicable for their manufacturing. During percussion drilling of angular holes, their shape significantly deviates from the cylindrical [4]. In addition, thin-walled combustion chambers with a thickness of 0.7÷1.0 mm are vulnerable to geometric deformation during processing, which, in the case of tool positioned at an acute angle (20÷30° to the surface), results in significan...

show abstract

GAS TURBINE COMBUSTION—Alternative Fuels and Emissions

Cited by 110 publications

References 0 publications

Gas Turbine Engine Combustors and the Estimation of Their Pressure Loss

Gas Turbine Engine Combustors and the Estimation of Their Pressure Loss

Experimental Investigation of the Influence of Combustor Cooling on the Characteristics of a FLOX©-Based Micro Gas Turbine Combustor

Triangulation methods for effusion holes measurements in combustion chambers of aircraft engines

Contact Info

Product

Resources

About