Applied Mathematics and Mechanics

, Volume 23, Issue 6, pp 694–702 | Cite as

Theoretical analysis of using airflow to purge residual water in an inclined pipe

  • Shen Fang
  • Yan Zong-yi
  • Zhao Yao-hua
  • Kiyoshi Horii


A refined theoretical analysis for using the spiral airflow and axial airflow to purge residual water in an inclined pipe was presented. The computations reveal that, in most cases, the spiral flow can purge the residual water in the inclined pipe indeed while the axial flow may induce back flow of the water, just as predicted in the experiments presented by Horii and Zhao et al. In addition the effects of various initial conditions on water purging were studied in detail for both the spiral and axial flow cases.

Key words

spiral flow axial flow water purging two-phase flow pipe flow 

CLC number

O35+. 1 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Schweinstein A M. Change of flow condition in U-Shaped conduits [J].Proc Congr Int Assoc Hydraul Res, 1987,22(3):280–281.Google Scholar
  2. [2]
    Underwood M P, Kendall C. Vacuum technology for pipeline and system drying [A]. In:The Proc Int Pipeline Technol Exhib Conf[C]. 1984,12:209–226.Google Scholar
  3. [3]
    Horii K. Using spiral flow for optical cord passing[J].Mechanical Engineering, 1990,112(8):68–69.Google Scholar
  4. [4]
    Horii K, Matsumae Y, Ohsumi K, et al. Novel optical fiber installation by use of spiral airflow [J].Journal of Fluids Engineerings, 1992,114(3):375–378.CrossRefGoogle Scholar
  5. [5]
    Horii K, Zhao Y H, Tomita Y, et al. High performance spiral air-flow apparatus for purging residual water in a pipeline [A]. In: D P Telionis Ed.ASME Fluids Engineering Division Summer Meeting [C]. Vancouver: ASME, FEDSM 97-3035, 1997, 1–6.Google Scholar
  6. [6]
    Fukano T. Liquid films flowing concurrently with air in horizontal duct[J].Trans JSME Series B, 1985,51(462):494–502.Google Scholar
  7. [7]
    SHEN Fang. Theoretical analysis of using airflow to purge residual water in pipe[D]. Thesis for Bachelor Degree. Beijing: Peking University, 1999, 1–35. (in Chinese)Google Scholar
  8. [8]
    WU Wang-yi.Fluid Mechanics [M]. Beijing: Peking University Press, 1981,2:267–311. (in Chinese)Google Scholar
  9. [9]
    ZHOU Guang-jiong, YAN Zong-yi, XU Shi-xiong, et al.Fluid Mechanics[M]. High Education Press, 1993,2:182–302. (in Chinese)Google Scholar

Copyright information

© Editorial Committee of Applied Mathematics and Mechanics 1980

Authors and Affiliations

  • Shen Fang
    • 1
  • Yan Zong-yi
    • 1
  • Zhao Yao-hua
    • 2
  • Kiyoshi Horii
    • 3
  1. 1.Department of Mechanics and Engineering SciencePeking UniversityBeijingP R China
  2. 2.Institute of Engineering ThermophysicsChinese Academy of SciencesBeijingP R China
  3. 3.Shirayuri CollegeTokyoJapan

Personalised recommendations