A detailed experimental airfoil performance investigation using an equipped wind tunnel

Hoseinzadeh, Siamak; Bahrami, Amin; Mirhosseini, Seyed Morteza; Sohani, Ali; Heyns, P.S.

doi:10.1016/j.flowmeasinst.2020.101717

Cited by 15 publications

(6 citation statements)

References 52 publications

(52 reference statements)

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“…This also means that the failure rate of the compressors is gradually increasing as the disks are continuing to wear due to ageing, friction and corrosion. The values of the shape and scale parameters obtained in our analysis were used to compute the mean time to failure (MTTF), failure rate and reliability of the gas turbine compressors using equations (1)(2)(3) and the following results were obtained: = 1892 ℎ , ( ) = 0.0004198 ( ) = 0.8499.…”

Section: Discussionmentioning

confidence: 99%

“…Nowadays, gas turbines are one of the most widely used power generating technologies. They find applications in power generation, as mechanical drives in industries and majorly in aviation as propulsion systems on air, land and sea [1][2][3]. The compressor unit is one of the three critical components of the gas turbine along with the combustion chamber and turbine.…”

Section: Introductionmentioning

confidence: 99%

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Application of the Two-parameter Weibull Distribution Method to Assess the Reliability of Gas Turbine Compressors

Ozonuwe

Onyekachi

Oside³

2020

JERR

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In this paper, the reliability of axial compressors of gas turbines used in oil and gas installations was analyzed by the application of the two-parameter Weibull distribution method. Reliability analysis is an important tool to minimize the failures of equipment, shorten repair time and enhance maintenance effectiveness because when a system is well-maintained system, it minimizes operating costs and optimizes throughput. The study involves the analysis of the failure times of three identical gas turbine compressors. The two-parameter Weibull distribution method was found to best fit the failure data with a correlation coefficient of 0.9886 using the rank regression method. Based on the result obtained for the two-parameter Weibull estimates, it is deduced that the compressors under consideration are at the end of their operational life (wear-out period). From the Weibull estimates obtained, the reliability and mean time to failure of the compressors were determined. This result can be used to carry out timely and effective maintenance of the compressors so as to improve their operation and availability.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of the Two-parameter Weibull Distribution Method to Assess the Reliability of Gas Turbine Compressors

Ozonuwe

Onyekachi

Oside³

2020

JERR

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“…En [17] tres diferentes geometrías de generadores de vórtices se pusieron a prueba, una rectangular, triangular y una Clark-Y; esto debido a que los generadores de vórtices pueden ser utilizados para optimizar el flujo en las aspas de las turbinas, esto puede mejorar la energía anual producida de 1% a 3%. No obstante, otros estudios concluyen que las simulaciones numéricas no son suficientes para describir adecuadamente las condiciones del viento alrededor del perfil; en una de estas se descubrió una relación inversa entre la velocidad del flujo del jet y el coeficiente de arrastre [18]. La literatura a menudo considera la TI solamente en el eje de giro de la turbina dentro del túnel de viento o en pruebas en campo, dejando por fuera la variación de la TI en otras partes del área barrida por el rotor, obviando que esta puede variar en este espacio.…”

Section: Introductionunclassified

Comportamiento de la intensidad de turbulencia en distintas áreas transversales en un túnel de viento

Richmond-Navarro,

Arias-Arguedas,

Casanova-Treto

2023

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Considerando que cada vez más turbinas eólicas operan en condiciones de turbulencia, este estudio sobre la intensidad de turbulencia (TI) en distintas áreas transversales en un túnel de viento se llevó a cabo. Un túnel de viento con un área de pruebas de 15 m de largo, 3.6 m de ancho y 2 m de alto se utilizó; se colocó una cuadricula de madera para generar turbulencia en el flujo y la velocidad del ciento se midió con un anemómetro de hilo caliente. Para determinar si hubo variaciones en la TI se definieron cinco puntos (centro, arriba, abajo, izquierda y derecha) en cuatro áreas transversales luego de la cuadricula de madera. Se determinó que la TI varía drásticamente dentro del área. Se calculó un porcentaje de error desde 3.6 % a 15.2 % cuando se consideraba la variación de la turbulencia dentro del área del rotor en comparación con cuando se usa solamente el punto en el eje del rotor. Para poder describir apropiadamente el flujo turbulento es necesario considerar el promedio de las mediciones de la turbulencia alrededor del área que cubre el rotor.

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“…Using the computational fluid dynamics (CFD) technique reduces the complexity and cost of empirical works (Pourmahmoud et al , 2014b; Hoseinzadeh et al , 2019, 2019; Sohani et al , 2016; Pourmahmoud et al , 2014c; Goshayeshi and Safaei, 2019; Hooman et al , 2019; Sabour et al , 2017; Pourmahmoud et al , 2014a; Hassanzadeh et al , 2017). Ejector or injector, the equipment that can transfer the flow of gas, liquid or solid, such as powders, granules and sludge by creating a vacuum (Hoseinzadeh et al , 2020a; Pourmahmoud et al , 2014a; Bahrami et al , 2019). These devices are responsible for two major tasks that are to generate vacuum and exhaust gases and the other is to mix different fluids (Ghalambaz et al , 2020, 2019).…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics analysis of the effect of throat diameter on the fluid flow and performance of ejector

Salehi

Pourmahmoud

Hassanzadeh

et al. 2020

HFF

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Purpose Using the computational fluid dynamics (CFD) technique, this paper aims to investigate the influence of key parameters such as throat diameter; the suction ratio on the flow field behaviors such as Mach number; pressure; and temperature. Design/methodology/approach To investigate the effect of throat diameter, it is simulated for 4, 6, 8 and 10 mm as throat diameters. The governing equations have been solved by standard code of Fluent Software together with a compressible 2 D symmetric and turbulence model with the standard k–ε model. First, the influence of the throat diameter is investigated by keeping the inlet mass flow constant. Findings The results show that a place of shock wave creation is changed by changing the throat diameter. The obtained results illustrate that the maximum amount of Mach number is dependent on the throat diameter. It is obtained from the results that for smaller throats higher Mach numbers can be obtained. Therefore, for mixing purposes smaller throats and for exhausting bigger throats seems to be appropriate. Originality/value The obtained numerical results are compared to the existing experimental ones which show good agreement.

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A detailed experimental airfoil performance investigation using an equipped wind tunnel

Cited by 15 publications

References 52 publications

Application of the Two-parameter Weibull Distribution Method to Assess the Reliability of Gas Turbine Compressors

Application of the Two-parameter Weibull Distribution Method to Assess the Reliability of Gas Turbine Compressors

Comportamiento de la intensidad de turbulencia en distintas áreas transversales en un túnel de viento

Computational fluid dynamics analysis of the effect of throat diameter on the fluid flow and performance of ejector

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