Fatigue Failure of a Distortion Screen during Testing

Biswas, Swati; Kumar, Jivan; Ganeshachar, M.D.; Babu, S. N. Narendra; Ramachandra, Srinivas Sulugodu

doi:10.1016/j.proeng.2013.03.285

Cited by 3 publications

(2 citation statements)

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“…It may be noted that distortion screens are susceptible to fatigue induced failure. 10 Moreover, the wire meshes of required porosity calculated by the inverse method were not available commercially. This forced the use of commercial mesh close to the design specification and settle for a compromise on the obtained total pressure pattern.…”

Section: Introductionmentioning

confidence: 99%

Flow field behind a complex total pressure distortion screen

Sivapragasam

2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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The flow field behind a complex total pressure distortion screen is investigated experimentally and numerically. The distortion screen is designed using an established design methodology and fabricated by water-jet cutting technique. The distorted total pressure field behind the screen is quantified by a distortion index parameter, which is evaluated from computations and experiments for several values of inlet Mach number. The root-mean-square error between the target total pressure values and that achieved by the screen design at the aerodynamic interface plane is 4.75%. The evolution of the distorted total pressure field downstream of the screen is presented in detail in terms of radial and circumferential total pressure distributions and their gradients. An alternative interpretation of the distorted total pressure field is made by means of defining a total pressure flux existing behind the screen and expanding it using derivative-moment transformation technique. It is seen that the circumferential vorticity is a major contributing factor to the total pressure flux.

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Section: Introductionmentioning

confidence: 99%

Flow field behind a complex total pressure distortion screen

Sivapragasam

2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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show abstract

“…Then, the final geometry is derived from that porosity, considering hexagonal pores in the mesh. This is because this type of geometry discretisation produces the lowest pressure drop across the screen [165] (which avoids excessive pressure loads that might turn into the failing of the panel during tests [166]). Finally, the resultant geometry can be easily manufactured via 3D printing (AM), automating hence the whole process.…”

Section: Methodology For An Automatic Geometry Generationmentioning

confidence: 99%