Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Andrew Ketsdever"'
Publikováno v:
Journal of Fluid Mechanics. 805:207-221
The rarefied gas flow phenomenon of thermophoresis is studied experimentally on a macroscopic spherical particle with a diameter of 5.1 cm for pressures ranging from 0.01 to 10 Pa (Knudsen numbers$Kn$from 10 to 0.01, respectively). Size scaling with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9eacaff77b238109004661a9a5b581b2
https://doi.org/10.1017/jfm.2016.464
https://doi.org/10.1017/jfm.2016.464
Autor:
Andrew Ketsdever, Ryan W. Bosworth
Publikováno v:
AIP Conference Proceedings.
Thermophoretic force acting on spheroids with an equivalent volume to a sphere with a 2.54 cm radius is measured and compared to a theoretical result based on the Waldmann limit. This work focuses on spheroids in which the modified axis is parallel t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::127a2179a842b58a05d838ae9cd48ac0
https://doi.org/10.1063/1.4967574
https://doi.org/10.1063/1.4967574
Autor:
Henning Struchtrup, Andrew Ketsdever
Publikováno v:
AIP Conference Proceedings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6dd81fc71442ffd336d6e66e4ba662c
https://doi.org/10.1063/1.4967536
https://doi.org/10.1063/1.4967536
Autor:
Andrew Ketsdever, Ryan W. Bosworth
Publikováno v:
AIP Conference Proceedings.
The contribution of vane thermal conductivity on the Crookes radiometer is experimentally investigated with four vane materials. This work examines increasing the force production of a radiometer vane for applications such as near-space propulsion by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b40d0e4c308c2340fa07c00384fc70e0
https://doi.org/10.1063/1.4967575
https://doi.org/10.1063/1.4967575
Publikováno v:
Journal of Propulsion and Power. 26:1016-1024
Feasibility of using beamed microwave energy to increase thrust of solid rocket motors during launch is analyzed. Coupling of microwave radiation with internal energies of micron-sized alumina particles and the successive transfer of internal energy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d18a8c4a25960460b9e2d44ba4be005b
https://doi.org/10.2514/1.48935
https://doi.org/10.2514/1.48935
Publikováno v:
AIP Conference Proceedings.
Both positive and negative thermophoretic forces are experimentally measured using a nano-Newton Thrust Stand (nNTS) to determine the effect of temperature gradient on force produced. It is found that there is an average 62% maximum force increase as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a46ca5633649eba5bf8cf104df4a72d
https://doi.org/10.1063/1.4902611
https://doi.org/10.1063/1.4902611
Publikováno v:
AIP Conference Proceedings.
The contribution of edge force on the Crookes radiometer is experimentally investigated with three vane geometries. This work examines increasing the force per unit weight of a radiometer vane for applications such as near-space propulsion by increas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe79f8985400720af2e2a0c8bfa10d96
https://doi.org/10.1063/1.4902613
https://doi.org/10.1063/1.4902613
Autor:
Andrew Ketsdever, Sergey Gimelshein
Publikováno v:
AIP Conference Proceedings.
Spacecraft contamination has long been a subject of study in the rarefied gas dynamics community. Professor Mikhail Ivanov coined the term a spacecraft's "own ambient environment" to describe the effects of natural and satellite driven processes on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec0adf6419a0cdbecd26a7542ff5b97c
https://doi.org/10.1063/1.4902754
https://doi.org/10.1063/1.4902754
The growing interest in the use of microspacecraft within government and industry is driving a critical need for new propulsion systems capable of fulfilling a wide range of mission requirements. The applicability of each propulsion system is highly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9706eec457e2f76e8d2bb3cbd2e65bf9
https://doi.org/10.21236/ada564003
https://doi.org/10.21236/ada564003
Publikováno v:
AIP Conference Proceedings.
The force that acts on a thin vane immersed in rarefied gas when a temperature gradient is imposed along or across the vane has historically been known as the Radiometric force. First observed by Fresnel in 1825, the radiometric force has regained it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36171fbfd529268f5a76dd2b675fe7d2
https://doi.org/10.1063/1.4769617
https://doi.org/10.1063/1.4769617