| Title |
Velocity Measurement Technique in a Narrow Passage by Hot-wire Anemometer |
| Authors |
김원갑(Won-Kap Kim) ; 한성호(Seong-Ho Han) ; 최영돈(Young-Don Choi) |
| Keywords |
열선유속계 ; 교정 ; 열선각 ; 방사각 ; 곡덕트 Hot-wire anemometer ; Calibration ; Probe angle ; Radial angle ; Curved duct |
| Abstract |
It was noted by the several researchers that the voltage outputs in response to a single yawed hot-wire sensor in a flow perpendicular to the axis deviate from the theoretical voltage output by King's law and Jorgensen's relation. This study noticed that the calibration coefficients of original Grande's method are not constant and fairly sensitive to the radial angle(). For more accuracy, this study interpolated the parameters of the Grande relation as a function of radial angle and compared velocity components with ones by Jorgensen and original Grande relation in the calibration jet flow. Finally, as a test case, 3-dimensional turbulent flows of the inlet plane of 180 degree bend are measured and compared the velocity components by above three methods and showed the characteristics of the flows. |