Numerical study of high particle mass loading effect on the impactor performance입자질량고부하가 임팩터성능에 미치는 영향에 관한 수치적 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 523
  • Download : 0
The effect of the high particle mass loading on the collection efficiency and particle-cut characteristics of the impactor and the particle motion in turbulent impinging round jet are numerically studied. In the high particle mass loading study, the flow is assumed to be laminar, dilute and two-way coupled. The vorticity-stream function approach is used to solve the gas phase flow field. Particle momentum equation is described by the Lagrangian approach. PSI-cell(Particle-Source-In cell) model for the computational scheme is used to account the interacting force term between the gas and particles. Results say that the effect of the particle interactions with the gas on the collection efficiency is enlarged as the amount of the particle mass loading increases. And this phenomena gets outstanding when the value of Reynolds number or the overall particle sizes increases. the effect of the high particle mass loading on the collection efficiency is found to be considerable even in slow flows when particles are large. In the study of the particle motions in turbulent impinging round jet flow, it is assumed that the gas-particle flow is one way coupled. The gas flow field is solved using a standard K-ε model and the wall function model for the boundary conditions. Lagrangian approach is used for the particle momentum equation, since the gas flow field has the high acceleration region near the impinging region. LSD model is applied to account the gas flow fluctuation effect on the particle motion. The results say that the effect of the turbulence characteristics on the particle motion is not negligible but it is less significant than that of the mean flow and geometry conditions.
Advisors
Kim, Sang-Sooresearcher김상수researcher
Description
한국과학기술원 : 기계공학과,
Publisher
한국과학기술원
Issue Date
1991
Identifier
61761/325007 / 000835432
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 기계공학과, 1991.2, [ x, 102 p. ]

URI
http://hdl.handle.net/10203/42700
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=61761&flag=dissertation
Appears in Collection
ME-Theses_Ph.D.(박사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0