Abstract
With an objective to discuss wake vortex roll-in as a wake characteristic of tapered annular wings, numerical simulation was performed on wakes of wings with two different shapes using a discrete vortex method, and a wake observation was made on a plate type model using a smoke wind tunnel. The test specimens are box-type wings and rectangular wings with the same aspect ratio of 2 as in the annular wings. The simulation provided the following results: A process for a vortex layer in the tapered annular wing to get rolled in to turn into a wake swirl consumes more time than in the case with generally used wings; and a tapered annular wing differs from a non-tapered wing in that a vortex layer in the vicinity of the upper center part remains in the upper part after the roll-in process. Wake observations with a simulation and smoke were compared. A pathline on the wing center seen in the smoke observation tended to be indicated longer. A pathline in the vicinity of the wind tunnel wall did not agree with the simulation result. This should have been because wall interference has occurred. However, both agreed with each other in the wake
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Okuyama, M;
[1]
Makino, M
[2]
- National Aerospace Laboratory, Tokyo (Japan)
- Nihon University, Tokyo (Japan). College of Science and Technology
Citation Formats
Okuyama, M, and Makino, M.
Simulated wake characteristics of tapered annular wings by a discrete vortex method; Usuyoku ni okeru taper tsuki enkan`yoku no koryu tokusei.
Japan: N. p.,
1992.
Web.
Okuyama, M, & Makino, M.
Simulated wake characteristics of tapered annular wings by a discrete vortex method; Usuyoku ni okeru taper tsuki enkan`yoku no koryu tokusei.
Japan.
Okuyama, M, and Makino, M.
1992.
"Simulated wake characteristics of tapered annular wings by a discrete vortex method; Usuyoku ni okeru taper tsuki enkan`yoku no koryu tokusei."
Japan.
@misc{etde_10156073,
title = {Simulated wake characteristics of tapered annular wings by a discrete vortex method; Usuyoku ni okeru taper tsuki enkan`yoku no koryu tokusei}
author = {Okuyama, M, and Makino, M}
abstractNote = {With an objective to discuss wake vortex roll-in as a wake characteristic of tapered annular wings, numerical simulation was performed on wakes of wings with two different shapes using a discrete vortex method, and a wake observation was made on a plate type model using a smoke wind tunnel. The test specimens are box-type wings and rectangular wings with the same aspect ratio of 2 as in the annular wings. The simulation provided the following results: A process for a vortex layer in the tapered annular wing to get rolled in to turn into a wake swirl consumes more time than in the case with generally used wings; and a tapered annular wing differs from a non-tapered wing in that a vortex layer in the vicinity of the upper center part remains in the upper part after the roll-in process. Wake observations with a simulation and smoke were compared. A pathline on the wing center seen in the smoke observation tended to be indicated longer. A pathline in the vicinity of the wind tunnel wall did not agree with the simulation result. This should have been because wall interference has occurred. However, both agreed with each other in the wake of a potential flow zone. 8 refs., 14 figs.}
place = {Japan}
year = {1992}
month = {May}
}
title = {Simulated wake characteristics of tapered annular wings by a discrete vortex method; Usuyoku ni okeru taper tsuki enkan`yoku no koryu tokusei}
author = {Okuyama, M, and Makino, M}
abstractNote = {With an objective to discuss wake vortex roll-in as a wake characteristic of tapered annular wings, numerical simulation was performed on wakes of wings with two different shapes using a discrete vortex method, and a wake observation was made on a plate type model using a smoke wind tunnel. The test specimens are box-type wings and rectangular wings with the same aspect ratio of 2 as in the annular wings. The simulation provided the following results: A process for a vortex layer in the tapered annular wing to get rolled in to turn into a wake swirl consumes more time than in the case with generally used wings; and a tapered annular wing differs from a non-tapered wing in that a vortex layer in the vicinity of the upper center part remains in the upper part after the roll-in process. Wake observations with a simulation and smoke were compared. A pathline on the wing center seen in the smoke observation tended to be indicated longer. A pathline in the vicinity of the wind tunnel wall did not agree with the simulation result. This should have been because wall interference has occurred. However, both agreed with each other in the wake of a potential flow zone. 8 refs., 14 figs.}
place = {Japan}
year = {1992}
month = {May}
}