introduction of measuring techniques for multiphase flow n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
多相流测量技术简介 Introduction of measuring techniques for multiphase flow PowerPoint Presentation
Download Presentation
多相流测量技术简介 Introduction of measuring techniques for multiphase flow

Loading in 2 Seconds...

play fullscreen
1 / 12

多相流测量技术简介 Introduction of measuring techniques for multiphase flow - PowerPoint PPT Presentation


  • 233 Views
  • Uploaded on

多相流测量技术简介 Introduction of measuring techniques for multiphase flow. 吴昌宁 (Hardson) Fluidization Laboratory of Tsinghua University wuchn98@flotu.org. MedImaging@smth 版聚 2004.12.26. 实验室简介. 流态化科研基地 & 纳米技术产业化研究中心 工业界和学术界的合作伙伴 SINOPEC, PetroChina, etc.; PetroBras, GE, Air Products, etc.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '多相流测量技术简介 Introduction of measuring techniques for multiphase flow' - tasha-bullock


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
introduction of measuring techniques for multiphase flow

多相流测量技术简介Introduction of measuring techniques for multiphase flow

吴昌宁 (Hardson)

Fluidization Laboratory of Tsinghua University

wuchn98@flotu.org

MedImaging@smth版聚

2004.12.26

slide2
实验室简介
  • 流态化科研基地 & 纳米技术产业化研究中心
  • 工业界和学术界的合作伙伴

SINOPEC, PetroChina, etc.; PetroBras, GE, Air Products, etc.

Ohio State University, Delft University, Tokyo University, West Ontario University, etc.

反应器内

流场示意图

石油催化裂化和

催化裂解反应器

包括:

浓度场

速度场

slide3
多相流流体力学性质的主要研究方法
  • 实验测量Particle Imaging Velocimetry (PIV)

Laser Doppler Velocimetry (LDV)

Ultrasonic Doppler Velocimetry (UDV)

Optical Fiber Probe

Flash X-ray Imaging System

Process Tomography (PT) (developing)

X-CT, ECT, UCT…

  • 数值模拟

Computational Fluid Dynamics (CFD)

slide4
多相流测量技术发展概览

X、γ射线衰减

非侵入式

线测量

发现X光

和放射性

CT算法

新型探测源高速探测器

传统测量

技术

PT、 PIV …

场测量

PT: 发展中

LDV …

非侵入式

点测量

发明Laser

高速CCD机

互相关算法

各有所长

互相结合

传感器技术的革 新

光纤探头技术等,侵入式,点测量

pt x ct vs
PT技术(如X-CT) vs.其他测量技术
  • non-invasive

vs. probe

  • field information

vs. probe/LDV

  • penetrability

vs. LDV/PIV

  • temporal resolution

limited by data acquisition

employed in dense-phase

slide6
X/γ射线在多相流测量中的早期应用
  • Bartholomew et al. (1957), Shell Oil Co.
    • reconstructed suspension density in a riser

Path layout for gamma ray measurements and reconstructed suspension density in a 518 mm ID riser

medical ct
Medical-CT应用于多相流测量
  • Medical CT was applied to industrial process in 1980s.
  • Banholzer et al. (1987) fluidized bed:43-mm-diameter 150-mm-tall
    • a medical X-CT scanner
    • 9 s/slice, spatial resolution = 0.24*0.24*1.5 mm3

density resolution better than 30 kg/m3

medical ct1
改进Medical-CT应用于多相流测量
  • Kantzas et al. (1994, 1996, 1997)
    • used a modified medical X-CT scanner to determine the holdup in fluidized and trickle beds
    • 3 s/slice, spatial resolution = 0.4*0.4*3 mm3

Medical-CT is often hard to be directly used in the industrial process

because of its fixed X-ray, high price, huge volume…

ict 1
ICT应用于多相流测量(1)
  • Grassler and Wirth (1999)
    • a 60 keV X-ray source, 128angle, 200 times/angle (15s)
    • a linear detector with 1024 sensitive elements
    • 256 x 256, spatial resolution = 0.8 mm
    • 20~40 min/slice,the scanning time is too long…

Grassler and Wirth (1999), Computerized Tomography for Industrial Applications and Image Processing in Radiology ,March 15~17

ict 2
ICT应用于多相流测量(2)
  • Kai et al. (2000)
    • eight election guns ,128detectors
    • 129*129, spatial resolution = 0.387 mm
    • 3.6 ms/slice

inner diameter of measuring area is 50mm

skyscan micro ct
SkyScan micro-CT (版主吩咐偶介绍一下,其实偶也不懂,)
  • 采用同步加速器结构中的专用束线技术,降低了X射线的噪声

http://www.skyscan.be

spatial resolution = 0.15~0.4m

scan time = 10min

spatial resolution = 48 m, scan time = 50s