المؤلفون: Mahboub, A., Bouzit, M., Ghenaim, A.

المصدر: Journal of Applied Fluid Mechanics; Nov/Dec2022, Vol. 15 Issue 6, p1649-1660, 12p

مصطلحات موضوعية: BOUNDARY layer separation, REYNOLDS number, DRAG coefficient, AERODYNAMICS, SHEARING force

مستخلص: The stall of an aircraft is one of the most dangerous phenomena in the aviation world, resulting in a sudden loss of lift because of boundary layer separation. This work aims to delay separation and to improve wing aerodynamic performances by introducing bumps and cavities on the upper surfaces of the wing. A numerical study on the effects of both cavities and bumps on flow structures and wing aerodynamics of NACA 0012 profile is conducted. The CFX code has been used to perform calculations of steady and uncompressible Reynolds Averaged Naviers-Stokes equations. The airfoil has been exposed to a free stream velocity of 5.616 m/s and chord based Reynolds number of 3.6 x 105 (chord length). A series of test on unmodified airfoil has been carried out for various turbulence models at angles of attack ranging from 0° to 15°. Then, the twoequation k-ω SST (Shear Stress Transport) has been retained for the further cases. Different configurations obtained through a modification of cavities and bumps shape, dimension, and position on the airfoil chord are investigated. Both the shapes considered are semi-spherical and semi-cylindrical, placed at two positions on the airfoil chord. The first location is in suction pick at X/C= 0.3 and the second one is at 0.7. Results show that the application of bumps delays the boundary layer separation and increase drag coefficient. A slight enhancement in lift and drag is observed at angle of attack of 15° for the cases where the cavities are placed at 0.7 m from the leading edge. In addition, calculations show that the stability of the vortex formed inside the cavities depends strongly on their shape and the cylindrical one has better performances. [ABSTRACT FROM AUTHOR]

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المؤلفون: Sodnik, Zoran, Karafolas, Nikos, Cugny, Bruno, Mot, B., Roudil, G., Longval, Y., Ade, P., André, Y., Aumont, J., Baustista, L., Bernard, J. -P., Bray, N., de Bernardis, P., Boulade, O., Bousquet, F., Bouzit, M., Buttice, V., Caillat, A., Charra, M., Chaigneau, M., Crane, B., Crussaire, J. -P., Douchin, F., Doumayrou, E., Dubois, J. -P., Engel, C., Etcheto, P., Gélot, P., Griffin, M., Foenard, G., Grabarnik, S., Hargrave, P., Hughes, A., Laureijs, R., Lepennec, Y., Leriche, B., Maestre, S., Maffei, B., Martignac, J., Marty, C., Marty, W., Masi, S., Mirc, F., Misawa, R., Montel, J., Montier, L., Narbonne, J., Nicot, J. -P., Pajot, F., Parot, G., Pérot, E., Pimentao, J., Pisano, G., Ponthieu, N., Ristorcelli, I., Rodriguez, L., Salatino, M., Savini, G., Simonella, O., Saccoccio, M., Tapie, P., Tauber, J., Torre, J. -P., Tucker, C.

المصدر: Proceedings of SPIE; July 2019, Vol. 11180 Issue: 1 p111806Z-111806Z-6, 1006261p

المؤلفون: Ruiz de Galarreta Fanju, C., Philippon, A., Bouzit, M., Appourchaux, T., Vial, J.-C., Maillard, J.-P., Lemaire, P.

المصدر: Proceedings of SPIE; November 2017, Vol. 10564 Issue: 1 p105643E-105643E-2, 950790p

المؤلفون: Sodnik, Zoran, Karafolas, Nikos, Cugny, Bruno, Longval, Y., Misawa, R., Ade, P., André, Y., de Bernardis, P., Bousquet, F., Bouzit, M., Buttice, V., Charra, M., Crane, B., Dubois, J. P., Engel, C., Griffin, M., Hargrave, P., Leriche, B., Maestre, S., Marty, C., Marty, W., Masi, S., Mot, B., Narbonne, J., Pajot, F., Pisano, G., Ponthieu, N., Ristorcelli, I., Rodriguez, L., Roudil, G., Simonella, O., Salatino, M., Savini, G., Tucker, C., Bernard, J.-P.

المصدر: Proceedings of SPIE; November 2017, Vol. 10563 Issue: 1 p105635X-105635X-9, 950725p

المؤلفون: Cugny, Bruno, Karafolas, Nikos, Sodnik, Zoran, Mot, B., Longval, Y., Ade, P., André, Y., Aumont, J., Baustista, L., Bernard, J.-Ph., Bray, N., de Bernardis, P., Boulade, O., Bousquet, F., Bouzit, M., Buttice, V., Caillat, A, Charra, M., Chaigneau, M., Coudournac, C., Crane, B., Crussaire, J.-P., Douchin, F., Doumayrou, E., Dubois, J. P., Engel, C., Etcheto, P., Gélot, P., Griffin, M., Foenard, G., Grabarnik, S., Hargrave, P., Hughes, A., Laureijs, R., Lepennec, Y., Leriche, B, Maestre, S., Maffei, B., Martignac, J., Marty, C., Marty, W., Masi, S., Mirc, F., Misawa, R., Montel, J., Montier, L., Narbonne, J., Nicot, J.-M., Pajot, F., Parot, G., Pérot, E., Pimentao, J., Pisano, G., Ponthieu, N., Ristorcelli, I., Rodriguez, L., Roudil, G., Salatino, M., Savini, G., Simonella, O., Saccoccio, M., Tapie, P., Tauber, J., Torre, J.-P., Tucker, C., Versepuech, G.

المصدر: Proceedings of SPIE; September 2017, Vol. 10562 Issue: 1 p105624C-105624C-9, 950626p

المؤلفون: Holland, Wayne S., Zmuidzinas, Jonas, Bernard, J.-Ph., Ade, P., André, Y., Aumont, J., Bautista, L., Bray, N., de Bernardis, P., Boulade, O., Bousquet, F., Bouzit, M., Buttice, V., Caillat, A., Charra, M., Chaigneau, M., Crane, B., Crussaire, J.-P., Douchin, F., Doumayrou, E., Dubois, J. P., Engel, C., Etcheto, P., Gélot, P., Griffin, M., Foenard, G., Grabarnik, S., Hargrave, P., Hughes, A., Laureijs, R., Lepennec, Y., Leriche, B., Longval, Y., Maestre, S., Maffei, B., Martignac, J., Marty, C., Marty, W., Masi, S., Mirc, F., Misawa, R., Montel, J., Montier, L., Mot, B., Narbonne, J., Nicot, J-M., Pajot, F., Parot, G., Pérot, E., Pimentao, J., Pisano, G., Ponthieu, N., Ristorcelli, I., Rodriguez, L., Roudil, G., Salatino, M., Savini, G., Simonella, O., Saccoccio, M., Tapie, P., Tauber, J., Torre, J.-P., Tucker, C.

المصدر: Proceedings of SPIE; July 2016, Vol. 9914 Issue: 1 p99140W-99140W-17, 9814878p

المؤلفون: Holland, Wayne S., Zmuidzinas, Jonas, Misawa, R., Bernard, J-Ph., Ade, P., André, Y., de Bernardis, P., Bouzit, M., Charra, M., Crane, B., Dubois, J. P., Engel, C., Griffin, M., Hargrave, P., Leriche, B., Longval, Y., Maes, S., Marty, C., Marty, W., Masi, S., Mot, B., Narbonne, J., Pajot, F., Pisano, G., Ponthieu, N., Ristorcelli, I., Rodriguez, L., Roudil, G., Salatino, M., Savini, G., Tucker, C.

المصدر: Proceedings of SPIE; July 2014, Vol. 9153 Issue: 1 p91531H-91531H-17, 9061587p

المؤلفون: Girone, M., Burdea, G., Bouzit, M., Popescu, V., Deutsch, J.E.

المصدر: Autonomous Robots; March 2001, Vol. 10 Issue: 2 p203-212, 10p

مستخلص: The “Rutgers Ankle” is a Stewart platform-type haptic interface designed for use in rehabilitation. The system supplies six-DOF resistive forces in response to virtual reality-based exercises running on a host PC. The Stewart platform uses double-acting pneumatic cylinders, linear potentiometers as position sensors, and a six-DOF force sensor. The Rutgers Ankle controller contains an embedded Pentium board, pneumatic solenoid valves, valve controllers, and associated signal conditioning electronics. Communication with the host PC is over a standard RS232 line. The platform movement and output forces are transparently recorded by the host PC in a database. This database can be accessed remotely over the Internet. Thus, the Rutgers Ankle Orthopedic Rehabilitation Interface will allow patients to exercise at home while being monitored remotely by therapists. A prototype was constructed, and proof-of-concept trials were conducted at the University of Medicine and Dentistry of New Jersey. The results indicate that the system works well as a diagnostic tool. The subjective evaluation by patients was very positive. Further medical trials are needed before the system clinical efficacy in rehabilitation can be established.

المؤلفون: Kadowaki, Naoto, Engel, C., Marty, C., Mot, B., Bernard, J.-Ph., Ristorcelli, I., Otrio, G., Leriche, B., Longval, Y., Pajot, F., Roudil, G., Caillat, A., Dubois, J. P., Bouzit, M., Buttice, V., Camus, T.

المصدر: Proceedings of SPIE; November 2017, Vol. 10565 Issue: 1 p1056506-1056506-6

المؤلفون: MacEwen, Howard A., Fazio, Giovanni G., Lystrup, Makenzie, Batalha, Natalie, Siegler, Nicholas, Tong, Edward C., Longval, Y., Mot, B., Ade, P., André, Y., Aumont, J., Baustista, L., Bernard, J.-Ph., Bray, N., de Bernardis, P., Boulade, O., Bousquet, F., Bouzit, M., Buttice, V., Caillat, A., Charra, M., Chaigneau, M., Crane, B., Crussaire, J.-P., Douchin, F., Doumayrou, E., Dubois, J.-P., Engel, C., Etcheto, P., Gélot, P., Griffin, M., Foenard, G., Grabarnik, S., Hargrave, P.., Hughes, A., Laureijs, R., Lepennec, Y., Leriche, B., Maestre, S., Maffei, B., Martignac, J., Marty, C., Marty, W., Masi, S., Mirc, F., Misawa, R., Montel, J., Montier, L., Narbonne, J., Nicot, J-M., Pajot, F., Parot, G., Pérot, E., Pimentao, J., Pisano, G., Ponthieu, N., Ristorcelli, I., Rodriguez, L., Roudil, G., Salatino, M., Savini, G., Simonella, O., Saccoccio, M., Tapie, P., Tauber, J., Torre, J.-P., Tucker, C.

المصدر: Proceedings of SPIE; July 2016, Vol. 9904 Issue: 1 p990458-990458-17