{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T17:08:06Z","timestamp":1754154486226,"version":"3.41.2"},"reference-count":32,"publisher":"Emerald","issue":"5","license":[{"start":{"date-parts":[[2011,9,6]],"date-time":"2011-09-06T00:00:00Z","timestamp":1315267200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011,9,6]]},"abstract":"<jats:sec><jats:title content-type=\"abstract-heading\">Purpose<\/jats:title><jats:p>The purpose of this current study is to identify the optimal stable position of airship, with reference to spatial variation of atmospheric wind flow, so as to reduce the vibrations and thus aid in the development of control mechanism of airship dynamics.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Design\/methodology\/approach<\/jats:title><jats:p>Study of uniform flow under steady\u2010state conditions was carried out through the measurements of pressure and velocity in a wind tunnel at low Mach numbers on airship model (in order of size, 1:13) inclined to the uniform air stream at various angles. The measurements have been made for a range of angles of incidence, in both vertical and horizontal planes, with a Reynolds number, based on the free stream velocity and a body cross\u2010sectional dimension, of order of four and six, respectively. Steady\u2010state numerical simulations were performed, serving comparative investigation with experimental data for the specific case of the model inclined to the free stream, with orientation of side\u2010slip (yaw) angle \u03b2=0 and angle of attack (pitch) \u03b1=0.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Findings<\/jats:title><jats:p>The numerical results showed similar trend as found by experimental analysis. In this study, several factors such as the pressure (C<jats:sub>p<\/jats:sub>), lift (C<jats:sub>L<\/jats:sub>), drag (C<jats:sub>D<\/jats:sub>) coefficients, pressure and air velocity were taken into account for comparative analysis. The analysis paved the way in identification of constructively stable position of airship model with orientation of \u03b2=0 and \u03b1=0, with respect to air flow direction.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Practical implications<\/jats:title><jats:p>The current findings aid in the development of control mechanism of airship dynamics.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Originality\/value<\/jats:title><jats:p>The experimental analysis of the airship model is presented along with computational fluid dynamics analysis of optimised shape of airship model in different orientations with respect to direction of airflow.<\/jats:p><\/jats:sec>","DOI":"10.1108\/00022661111159861","type":"journal-article","created":{"date-parts":[[2011,9,17]],"date-time":"2011-09-17T07:05:45Z","timestamp":1316243145000},"page":"255-265","source":"Crossref","is-referenced-by-count":2,"title":["Study of external air flow for an AURORA"],"prefix":"10.1108","volume":"83","author":[{"given":"Alves","family":"Ribeiro","sequence":"first","affiliation":[]},{"given":"Vishveshwar R.","family":"Mantha","sequence":"additional","affiliation":[]},{"given":"Abel I.","family":"Rouboa","sequence":"additional","affiliation":[]},{"given":"Daniel A.","family":"Marinho","sequence":"additional","affiliation":[]},{"given":"Ant\u00f3nio J.","family":"Silva","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"key2022021720151518100_b3","unstructured":"Azinheira, J.R. (2002), \u201cNumerical trimming and linearized model of AURORA airship dynamics\u201d, ICONAR Report No. 2\/2002, Instituto Superior T\u00e9cnico, Lisboa, Av. Rovisco 1049\u2010001."},{"key":"key2022021720151518100_b1","unstructured":"Azinheira, J.R., Paiva, E.C., Ramos, J.J.G., Bueno, S.S. and Bergerman, M. (2001a), \u201cExtended dynamic model for AURORA robotic airship\u201d, paper presented at the 14th AIAA Lighter\u2010Than\u2010Air Conference and Exhibition, July, Akron, OH."},{"key":"key2022021720151518100_b2","doi-asserted-by":"crossref","unstructured":"Azinheira, J.R., Paiva, E.C., Carvalho, J.R.H., Ramos, J.J.G., Bueno, S.S., Bergerman, M. and Ferreira, P.A.V. (2001b), \u201cLateral\/directional control for an autonomous, unmanned airship\u201d, Aircraft Engineering & Aerospace Technology, Vol. 73 No. 5, pp. 453\u20109.","DOI":"10.1108\/EUM0000000005880"},{"key":"key2022021720151518100_b4","doi-asserted-by":"crossref","unstructured":"Brederode, V. and Bradshaw, P. 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