Research for The Saltation in A Horizontal Pneumatic Conveying
| Project/Area Number |
17560164
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Fluid engineering
|
|---|
| Research Institution | Kurume Institute of Technology |
|---|
Principal Investigator |
TASHIRO Hiroyuki Kurume Institute of Technology, Department of Engineering, Professor (80122836)
|
|---|
| Project Period (FY) |
2005 – 2007
|
| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥2,250,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥150,000)
Fiscal Year 2007: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥1,000,000 (Direct Cost: ¥1,000,000)
|
|---|
| Keywords | Fluid Dynamics / Gas-Solid Two-Phase Flow / Pipe Flow / Numerical Analysis / Saltation Velocity / Optimal Conveying Velocity |
|---|
| Research Abstract |
The selection of optimal air velocity is important in the pneumatic conveying. Therefore, in the present study, I aimed at predicting that velocity from the flow pattern of particle in the horizontal pneumatic conveying of a single particle. And, I tried to define and find that velocity on the basis of the experiment and the calculation. Consequently, the following results were found.
(1) I can define the terminal settling velocity as the saltation velocity for ABS resin particles according to the definition by Zenz because the particle motion changes from the frequent bouncing motion to the mainly floating motion when the air velocity exceeds around the terminal settling velocity.
(2) The particle conveying is possible for all the particles even when the mean air velocity is smaller than the terminal settling velocity of particle.
(3) In case of the diameter ratio of particle to the pipe is 0.6, the dimensionless particle velocities of every ABS particles are increased with increasing th
… More
e air velocity until around the terminal settling velocity, and become almost constant or approach the constant asymptotically when the air velocity exceeds around the terminal settling velocity with the exception of the case of stainless steel particle.
(4) In case of the diameter ratio is 0.2, the dimensionless particle velocity of all particle is almost constant independent of the air velocity.
(5) The particle velocity in case of larger diameter ratio is larger when the air velocity is larger than 10m/s.
(6) There is a maximum revolution in each particle, and the air velocity of higher density particle at the maximum is larger than that of the lower density particle.
(7) The arrival time interval of particles in case of the smaller air velocity is larger than that of larger air velocity.
(8) The particle motion such as the particle velocity and the revolution of particle can be qualitatively and quantitatively simulated by the present calculation reasonably if the coefficients of restitution of particle to the pipe wall and of kinetic friction of particle with the pipe wall are estimated exactly. Less
|
Report
(4 results)
Research Products
(11 results)
