Onset of Flash Atomization in a Propellant MicrojetSource: Journal of Fluids Engineering:;2015:;volume( 137 ):;issue: 009::page 91101Author:Shemirani, Farzin M.
,
Church, Tanya K.
,
Lewis, David A.
,
Finlay, Warren H.
,
Vehring, Reinhard
DOI: 10.1115/1.4030089Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The parameters affecting the onset of flashing in microjets were studied. A custom atomizer assembly was designed to produce jets of propellant mixtures at different temperatures. Propellants chosen were HFA134a and HFA227ea, which are used in most pressurized metered dose inhalers (pMDIs). Ethanol was added to the propellants to investigate its effect on flashing. Orifices used ranged from 5 to 35 خ¼m in diameter. A critical jet diameter above which flashing was the dominant mechanism of atomization was found at each temperature and formulation. A correlation was developed to relate the critical jet diameter to the thermophysical properties of the formulation.
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| contributor author | Shemirani, Farzin M. | |
| contributor author | Church, Tanya K. | |
| contributor author | Lewis, David A. | |
| contributor author | Finlay, Warren H. | |
| contributor author | Vehring, Reinhard | |
| date accessioned | 2017-05-09T01:19:06Z | |
| date available | 2017-05-09T01:19:06Z | |
| date issued | 2015 | |
| identifier issn | 0098-2202 | |
| identifier other | fe_137_09_091101.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/158298 | |
| description abstract | The parameters affecting the onset of flashing in microjets were studied. A custom atomizer assembly was designed to produce jets of propellant mixtures at different temperatures. Propellants chosen were HFA134a and HFA227ea, which are used in most pressurized metered dose inhalers (pMDIs). Ethanol was added to the propellants to investigate its effect on flashing. Orifices used ranged from 5 to 35 خ¼m in diameter. A critical jet diameter above which flashing was the dominant mechanism of atomization was found at each temperature and formulation. A correlation was developed to relate the critical jet diameter to the thermophysical properties of the formulation. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Onset of Flash Atomization in a Propellant Microjet | |
| type | Journal Paper | |
| journal volume | 137 | |
| journal issue | 9 | |
| journal title | Journal of Fluids Engineering | |
| identifier doi | 10.1115/1.4030089 | |
| journal fristpage | 91101 | |
| journal lastpage | 91101 | |
| identifier eissn | 1528-901X | |
| tree | Journal of Fluids Engineering:;2015:;volume( 137 ):;issue: 009 | |
| contenttype | Fulltext |