Modeling of gas dynamics in a pulse combustion chamber to predict initial drying process parameters

Kuts, P. S.; Akulich, P. V.; Grinchik, N. N.; Strumiłło, Czesław; Zbiciński, Ireneusz; Nogotov, E. F.

doi:10.1016/s1385-8947(01)00268-6

Cited by 12 publications

(6 citation statements)

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“…6,7 PC has been used in drying processes because it can increase the drying rates significantly. The advantages of PC in spray drying have been reported by Zbicinski et al 8 and Kuts et al 9 It has also been used for drug production, as reported by Liang et al 10 SP differs from spray drying, in that SP involves evaporation, drying, and thermal decomposition or reaction, while spray drying only involves evaporation and drying. The use of PC for oxide particle synthesis has not been studied previously, and the effect of pressure oscillations on the particle synthesis process needs to be studied further.…”

Section: Introductionmentioning

confidence: 93%

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A Pulse Combustion‐Spray Pyrolysis Process for the Preparation of Nano‐ and Submicrometer‐Sized Oxide Particles

Widiyastuti

Wang

Purwanto

et al. 2007

Journal of the American Ceramic Society

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The preparation of nano‐ and submicrometer particles using an integrated pulse combustion–spray pyrolysis process was investigated for the first time. Zinc oxide nanoparticles with average sizes ranging from 20 to 40 nm were synthesized using a salt precursor with a lower decomposition temperature than the pulse combustion (PC) temperature. Particles of a doped‐type oxide, gadolinium oxide‐doped with europium, were also produced from a precursor, whose decomposition temperature was higher than the PC temperature, and were observed to be ellipsoidal–toroidal in shape and submicrometer in size. The high‐intensity fluctuating pressures generated by PC and the precursor decomposition temperature are proposed as the reasons for the formation of either nanoparticles or aspherical particles. In addition, hot gas fluctuating flow in PC enhanced energy transfer, resulting in more crystalline particles, as compared with particles produced by conventional spray pyrolysis.

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Section: Introductionmentioning

confidence: 93%

“…The advantages of PC in spray drying have been reported by Zbicinski et al 8 . and Kuts et al 9 . It has also been used for drug production, as reported by Liang et al 10 .…”

Section: Introductionmentioning

confidence: 99%

A Pulse Combustion‐Spray Pyrolysis Process for the Preparation of Nano‐ and Submicrometer‐Sized Oxide Particles

Widiyastuti

Wang

Purwanto

et al. 2007

Journal of the American Ceramic Society

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“…oscillating gas flow [11,12], (3) spray characteristics of precursor droplets [13], and (4) whether the addition of a heating furnace is necessary [7]. The PC-SP parameters of points (1) and (2) were estimated in both our previous studies [7], and in those of many other researchers, e.g., Zbicinski et al [14], Kuts et al [15], and Wang et al [16]. The present study examines the effects of atomizer type, e.g., ultrasonic nebulizer or nozzle, on the spray characteristics of precursor droplets (point 3), and the addition of a heating furnace (point 4).…”

Section: Introductionmentioning

confidence: 99%

Intense UV-light absorption of ZnO nanoparticles prepared using a pulse combustion-spray pyrolysis method

Joni

Purwanto

Iskandar

et al. 2009

Chemical Engineering Journal

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“…Pulse combustion is a special oscillating process driven by combustion, coupled with resonant oscillation of the flow in a tailpipe. Pulse combustion is recognized for high combustion intensity, high heat transfer rates, and lower pollutant emission than steady combustion. − At the present time, pulse combustion is emerging in many industrial applications including from powering propulsion to incineration to drying, and a large variety of possible uses of pulse combustors are in the developmental stage. − …”

Section: Introductionmentioning

confidence: 99%

Characteristics of the Pulsatile Flow in a Self-excited Pulse Combustor Tailpipe

Zhai

Dong

2010

Ind. Eng. Chem. Res.

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This paper designs and describes a self-excited pulse combustion system. The experimental result shows that combustion oscillations can be produced with a steady supply of fuel and air without mechanical or aerodynamic valves. A large decoupling chamber with an exhaust pipe is connected at the end of the tailpipe of the pulse combustor. The temperatures and pressures along the tailpipe are measured. Pulsatile flow in the self-excited pulse combustor tailpipe is numerically simulated by FLUENT. A study case based on the experimental measurement data is simulated with compressible flow equations. Numerical simulation results which are close to the experimental measurement data show that the main characteristics are the increase in velocity amplitude and the decrease in mean velocity along the tailpipe, and the profiles of velocity at the tailpipe exit behave more like laminar pulsatile flows, whereas the profiles of velocity far away from the tailpipe exit behave like turbulence pulsatile flows. The profile of mean temperature along the tailpipe is affected only within a short distance from the tailpipe exit, where the amplitude of mass flow rate oscillation significantly increases. The pressure amplitude gradient is greater near the tailpipe exit than upstream. The pulsatile flow in the tailpipe of the self-excited pulse combustor behaves like an acoustic resonance in a Schmidt pulse combustor.

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Modeling of gas dynamics in a pulse combustion chamber to predict initial drying process parameters

Cited by 12 publications

References 0 publications

A Pulse Combustion‐Spray Pyrolysis Process for the Preparation of Nano‐ and Submicrometer‐Sized Oxide Particles

A Pulse Combustion‐Spray Pyrolysis Process for the Preparation of Nano‐ and Submicrometer‐Sized Oxide Particles

Intense UV-light absorption of ZnO nanoparticles prepared using a pulse combustion-spray pyrolysis method

Characteristics of the Pulsatile Flow in a Self-excited Pulse Combustor Tailpipe

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