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A study of velocity-coupled response...

Cardiff, Eric Huntington.

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A study of velocity-coupled responses of distributed aluminum combustion.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	A study of velocity-coupled responses of distributed aluminum combustion./
作者:	Cardiff, Eric Huntington.
面頁冊數:	187 p.
附註:	Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2466.
Contained By:	Dissertation Abstracts International63-05B.
標題:	Engineering, Aerospace. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3051629
ISBN:	0493668853

A study of velocity-coupled responses of distributed aluminum combustion.
Cardiff, Eric Huntington.

A study of velocity-coupled responses of distributed aluminum combustion. - 187 p.

Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2466.

Thesis (Ph.D.)--The Pennsylvania State University, 2002.

The velocity-coupled response of distributed combustion of aluminum particles over a combusting solid propellant was successfully determined over a range of pressures and frequencies. A Velocity-Coupled Distributed Combustion (VCDC) magnetic flowmeter was used to measure the phase differences between the oscillatory pressure and velocity inside of a combustion chamber. Additional velocity excitation needed to determine different values of the response was created by a set of PiezoSiren<super>©</super> acoustic exciters. This velocity excitation along the transverse axis of the chamber was coupled to an axial acoustic wave, which is generated inside of the chamber by means of a toothed gear rotating above a choked nozzle.

ISBN: 0493668853Subjects--Topical Terms:

1018395
Engineering, Aerospace.

A study of velocity-coupled responses of distributed aluminum combustion.
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100 1 $a Cardiff, Eric Huntington. $3 1899862
245 1 0 $a A study of velocity-coupled responses of distributed aluminum combustion.
300 $a 187 p.
500 $a Source: Dissertation Abstracts International, Volume: 63-05, Section: B, page: 2466.
500 $a Adviser: Michael Micci.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 2002.
520 $a The velocity-coupled response of distributed combustion of aluminum particles over a combusting solid propellant was successfully determined over a range of pressures and frequencies. A Velocity-Coupled Distributed Combustion (VCDC) magnetic flowmeter was used to measure the phase differences between the oscillatory pressure and velocity inside of a combustion chamber. Additional velocity excitation needed to determine different values of the response was created by a set of PiezoSiren<super>©</super> acoustic exciters. This velocity excitation along the transverse axis of the chamber was coupled to an axial acoustic wave, which is generated inside of the chamber by means of a toothed gear rotating above a choked nozzle.
520 $a The acoustic performance of the chamber was validated via cold flow. The individual exciters were calibrated to examine the frequency ranges over which they are capable of providing the desired velocity excitation. The acoustic excitation of the full system was also tested in cold flow to verify that an acoustic velocity excitation was being produced.
520 $a A model was developed to analyze the results of the experiment and identify the velocity-coupled response of the distributed combustion from the measured phase differences. The model uses the aluminum combustion model developed by Beckstead <italic>et al</italic>. and the dynamics of the combusting aluminum particle to determine the anticipated acoustics inside of the VCDC magnetic flowmeter<super>47</super>. Particle damping was also considered and has a large effect on the phase differences within 0.02 meters of the surface of the propellant. The experimental phase differences were best fit by a reduced phase damping efficiency of 80%.
520 $a The responses were successfully measured by comparing the phase differences of the acoustic pressure and velocity inside of the combustion chamber to the output of the model. At low pressure and frequency conditions (around 300 psi and 1000 Hz), this comparison indicates that the velocity-coupled response of the aluminum particles is 4.15 ± 0.45 for the entire lifetime of the particle. Increasing frequency has very little effect on the response, but higher mean pressure conditions (1000 psi) indicated a much higher response of 7.
590 $a School code: 0176.
650 4 $a Engineering, Aerospace. $3 1018395
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Physics, Acoustics. $3 1019086
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773 0 $t Dissertation Abstracts International $g 63-05B.
790 1 0 $a Micci, Michael, $e advisor
790 $a 0176
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3051629