Sensor probe stabilized blowing system for telecommunication conduit using spiral airflow

Kiyoshi Horii, Yuji Tomita, Isao Kataoka, Hiroki Kuwano, Yukio Shimo, Hiroyuki Ito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A streamlined sensor probe for inspecting telecommunication conduit interiors has been blown with a highly stable rotating motion using spiral airflow. The stability achieved with this spiral system increases both the accuracy and ease of the inspection process in the telecommunication industry. To elucidate this stabilized blowing, a fluid dynamics model of the probe motion in both turbulent and spiral flows has been investigated. In a turbulent pipe flow, the airflow is disturbed by the irregularly fluctuating wake in front of the probe. The instability of probe and airflow increases and inspection can not be completed. However, the steep velocity distribution of the ordered spiral airflow holds a pair of stream wise line vortices ahead of the probe in the pipe axial position. Thus the flow downstream increases its radial pressure gradient and the probe is stabilized. This stabilization is achieved by the synergistic relationship between the spiral airflow and the streamlined probe. To clarify the physical background of stable probe motion in a spiral flow, a preliminary analysis of turbulent flow around the probes has been carried out based on the conservation equations.

Original languageEnglish
Title of host publicationIndustrial and Environmental Applications of Fluid Mechanics
PublisherPubl by ASME
Pages35-39
Number of pages5
ISBN (Print)079181369X
Publication statusPublished - 1994
Externally publishedYes
EventProceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18) - Lake Tahoe, NV, USA
Duration: 1994 Jun 191994 Jun 23

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
Volume186

Other

OtherProceedings of the 1994 ASME Fluids Engineering Division Summer Meeting. Part 9 (of 18)
CityLake Tahoe, NV, USA
Period94/6/1994/6/23

ASJC Scopus subject areas

  • Engineering(all)

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