Zobrazeno 1 - 10
of 59
pro vyhledávání: '"M.V. Lowson"'
Autor:
J.M. Gaitonde, M.V. Lowson
Publikováno v:
Composites Science and Technology. 40:69-85
The thermal expansion of poly(ether ether ketone), a modification of poly (ether sulphone) and carbon fibre reinforced composites of these polymers has been measured over the range −153 to 27°C with a push-rod diameter. Where other measurements ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3611d58ddd20b24dd2708f8f7446b26
https://doi.org/10.1016/0266-3538(91)90043-o
https://doi.org/10.1016/0266-3538(91)90043-o
Autor:
M.V. Lowson
Publikováno v:
The Aeronautical Journal. 97:332-333
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3984d340ffb56a99bc31ea8de4f71ec
https://doi.org/10.1017/s0001924000026610
https://doi.org/10.1017/s0001924000026610
Autor:
M.V. Lowson
Publikováno v:
Journal of Sound and Vibration. 54:237-247
Both a simple and a more refined analysis of signals with varying frequency have shown that optimum resolution of such signals can be achieved with records of length T = a−0·5, where a is the rate of change of frequency. The resolution obtained is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e44985891db51c2c61bf9bf789994b32
https://doi.org/10.1016/0022-460x(77)90026-8
https://doi.org/10.1016/0022-460x(77)90026-8
Autor:
M.V. Lowson, S. Baskaran
Publikováno v:
Journal of Sound and Vibration. 38:185-194
The paper studies the propagation of sound in an elliptic duct, which is of considerable interest in the field of jet-engine noise reduction. The cutoff frequencies of the higher-order circumferential modes in an elliptic duct are calculated for vari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af93260f0385513bca8c0a4212be6480
https://doi.org/10.1016/s0022-460x(75)80003-4
https://doi.org/10.1016/s0022-460x(75)80003-4
Autor:
M.V. Lowson, R.J. Jupe
Publikováno v:
Journal of Sound and Vibration. 37:475-489
The geometry of the wave forms of a supersonic rotor is described, based on a ray theory. The waves formed by a non-translating supersonic rotor are found to be limited by a hyperboloid, causing a cone of silence centred on the axis where only radiat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2ac63c0ff59a70d88fb3173fbd9d049
https://doi.org/10.1016/s0022-460x(74)80028-3
https://doi.org/10.1016/s0022-460x(74)80028-3
Autor:
M.V. Lowson
Publikováno v:
Journal of Sound and Vibration. 3:454-466
The basic mechanisms of noise generation due to mass introduction, applied force and applied stress are discussed with reference to their implications for helicopters, V/STOL aircraft and ground effect machines. The significance of the dimensional de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7469ed75eb4e559a7b07f75ebf3de34b
https://doi.org/10.1016/0022-460x(66)90109-x
https://doi.org/10.1016/0022-460x(66)90109-x
Autor:
M.V. Lowson
Publikováno v:
Journal of Sound and Vibration. 7:380-392
High levels of pressure fluctuation have been observed on surfaces beneath shock waves in turbulent flow. These levels contribute substantially to the buffet loadings experienced by aircraft and space vehicles in transonic and supersonic flight. It h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90616686a3356b1de64345dafa7f9e28
https://doi.org/10.1016/0022-460x(68)90137-5
https://doi.org/10.1016/0022-460x(68)90137-5
Autor:
J. B. Ollerhead, M.V. Lowson
Publikováno v:
Journal of Sound and Vibration. 9:197-222
A comprehensive theoretical study of the problem of helicopter rotor noise radiation is presented. The theory includes blade slap, rotation noise and vortex noise effects. Peak spectral levels over the “vortex noise” region are shown to be due to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d592952c177f683fa46faeb1821afc8
https://doi.org/10.1016/0022-460x(69)90028-5
https://doi.org/10.1016/0022-460x(69)90028-5
Autor:
M.V. Lowson, J. B. Ollerhead
Publikováno v:
The Journal of the Acoustical Society of America. 44:624-630
The acoustic field of small, cold supersonic jets has been studied by shadowgraph visualization. Preliminary experiments showed the importance of choosing an optimum film position for the visualization of sound waves. The interpretation of shadowgrap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6ccf296ac7fd6aa37c3e89975d5ff01
https://doi.org/10.1121/1.1911131
https://doi.org/10.1121/1.1911131
Autor:
D.J. Snow, M.V. Lowson
Publikováno v:
Journal of Sound and Vibration. 25:465-477
An experimental and theoretical programme was undertaken to measure and predict the attenuation of plane and spiral modes within a cylindrical and annular lined duct. A standard duct modal theory was used for the cylindrical duct whereas a thin annul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21e8f93d45d85228722e1c87be090729
https://doi.org/10.1016/0022-460x(72)90194-0
https://doi.org/10.1016/0022-460x(72)90194-0