| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
|---|
| Outline of Final Research Achievements |
A compression wave, a shock wave and an expansion wave are generally called a pressure wave. These waves induce rapid pressure fluctuation. In order to control the rapid pressure fluctuation at the time of these pressure waves propagating in a long tube (a pipeline and a tunnel), it is required to get to know correctly attenuation of the strength of the pressure wave and time modification of a wavefront in a propagation process, i.e., the nonlinear phenomenon of propagation and the disappearance phenomenon of forming shock wave in the non-linear propagation of compression wave in the long tube. In this research, detailed measurement of the changes phenomenon of the forming shock wave and the unsteady boundary layer about wavefront modification of the pressure wave which propagates in very long tube was performed using the detailed experiment which used the laser differential interferometer, and useful data was obtained.
|
