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Aircraft-Based Aerosol and Gas Sampl...

Yang, Da,

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Aircraft-Based Aerosol and Gas Sampling: Inlet Design and Performance Analysis /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Aircraft-Based Aerosol and Gas Sampling: Inlet Design and Performance Analysis // Da Yang.
作者:	Yang, Da,
面頁冊數:	1 electronic resource (157 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-02, Section: B.
Contained By:	Dissertations Abstracts International84-02B.
標題:	Fluid mechanics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29166985
ISBN:	9798837533051

Aircraft-Based Aerosol and Gas Sampling: Inlet Design and Performance Analysis /
Yang, Da,

Aircraft-Based Aerosol and Gas Sampling: Inlet Design and Performance Analysis /Da Yang. - 1 electronic resource (157 pages)

Source: Dissertations Abstracts International, Volume: 84-02, Section: B.

Accurate aircraft-based measurements of atmospheric composition require well characterized inlets for sampling aerosol and gas. While aerosol inlets have been studied widely, there is limited understanding of gas inlets. Traditionally, gas-phase sampling from aircraft is made using a rear-facing inlet that ensures that aerosol particles are largely not sampled because of their inertia. Such inlets largely sample gas from the boundary layer of the external structure and the samples are likely to be compromised or contaminated. In this thesis, the performance of two inlet designs - one side-facing and another forward-facing - is analyzed for a range of aircraft conditions. The inlet designs are presented and their particle and gas sampling characteristics are established using computational fluid dynamics (CFD) modeling considering the conditions of flow compressibility, non-continuum particle drag, and gas turbulence. The CFD predictions are validated with wind-tunnel measurements made in the US Airforce high speed wind-tunnel in Fort Collins, Colorado. Additionally, we model the fate of sampled gas and particles through downstream transport sections, including pressure reduction sections, to characterize full system response and validate these predictions using experiments. The validated modeling results are used as a simulation database to predict inlet performance as a function of aircraft operating conditions. The model allows for accurate accounting of sampling performance to characterize the atmosphere and helps improve our ability to determine the role of trace gases and aerosol in our changing climate.

English

ISBN: 9798837533051Subjects--Topical Terms:

528155
Fluid mechanics.
Subjects--Index Terms:

Aerosol sampling

Aircraft-Based Aerosol and Gas Sampling: Inlet Design and Performance Analysis /
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520 $a Accurate aircraft-based measurements of atmospheric composition require well characterized inlets for sampling aerosol and gas. While aerosol inlets have been studied widely, there is limited understanding of gas inlets. Traditionally, gas-phase sampling from aircraft is made using a rear-facing inlet that ensures that aerosol particles are largely not sampled because of their inertia. Such inlets largely sample gas from the boundary layer of the external structure and the samples are likely to be compromised or contaminated. In this thesis, the performance of two inlet designs - one side-facing and another forward-facing - is analyzed for a range of aircraft conditions. The inlet designs are presented and their particle and gas sampling characteristics are established using computational fluid dynamics (CFD) modeling considering the conditions of flow compressibility, non-continuum particle drag, and gas turbulence. The CFD predictions are validated with wind-tunnel measurements made in the US Airforce high speed wind-tunnel in Fort Collins, Colorado. Additionally, we model the fate of sampled gas and particles through downstream transport sections, including pressure reduction sections, to characterize full system response and validate these predictions using experiments. The validated modeling results are used as a simulation database to predict inlet performance as a function of aircraft operating conditions. The model allows for accurate accounting of sampling performance to characterize the atmosphere and helps improve our ability to determine the role of trace gases and aerosol in our changing climate.
546 $a English
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650 4 $a Aerospace engineering. $3 1002622
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653 $a Aerosol sampling
653 $a Aircraft-based sampling
653 $a Gas sampling
653 $a Inlet design
653 $a Inlet performance Analysis
653 $a Particle loss through orifice
690 $a 0204
690 $a 0548
690 $a 0538
710 2 $a Clarkson University. $b Mechanical Engineering. $e degree granting institution. $3 3823847
720 1 $a Dhaniyala, Suresh $e degree supervisor.
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791 $a Ph.D.
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