A Sensor Probe Blowing for Inspecting Conduit Interiors in Telecommunication Industry
| Project/Area Number |
06650219
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Fluid engineering
|
|---|
| Research Institution | Shirayuri College |
|---|
Principal Investigator |
HORII Kiyoshi Shirayuri College Dept.of Literature, Professor, 文学部, 教授 (40129896)
|
|---|
| Project Period (FY) |
1994 – 1995
|
| Project Status |
Completed (Fiscal Year 1995)
|
| Budget Amount *help |
¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1995: ¥400,000 (Direct Cost: ¥400,000)
|
|---|
| Keywords | Spiral flow / Telecommunication Conduit Inspection / Sensor / Fluids Engineering / Optical Fiber Telecommunication / 旋回流 / 管内流 / 協同現象 / 混相流 / センサプローブ |
|---|
| Research Abstract |
A sensor probe for inspecting conduit interiors in telecommunication industry has been blown with high stability trough long distances using spiral airflow.
A sensor probe stabilization can be achieved by controlling three physical factors ; the wake in the rear of the probe should stabilize with less agitation, the annular flow instability between the probe and the inner wall of a conduit should be small, and pressure distributions between the front and the rear in a probe should be symmetric.
These requirements has been achieved by using spiral airflow and streamlined probes. A streamlined probe should generate a smother flow with less agitation of wake in the rear of sensor probe compared to the other probes. A steep axial velocity distribution of spiral airflow has rotated a probe around the conduit axis, resulting in a stabilization of the wake in the rear of a probe. Furthermore it has fixed the tail of wake toward the conduit axis, leading the maintain of a steep velocity profile in spiral airflow. This probe stabilization was achieved by synergism between the spiral airflow and probe.
Second stage to put to practical use, parachute performances for pulling a sensor probe has been investigated. Spiral airflow has helped to create a high drag force on the parachute by keeping the parachute fully inflated during the inspection process, due to a small fluctuation of radial component in spiral airflow. An approximate solution is presented to explain the effect.
|
Report
(3 results)
Research Products
(19 results)
