CORRELATION MEASUREMENT OF TURBULENT FLUCTIONS IN CURVED CHANNEL USING A TWO POINT LDV SYSTEM

Laser doppler velocimetry (LDV) measurements have been carried out in fully developed curved channel flows Reynolds number based on bulk velocity U and half the channel width δ is about 5 000 Streamwise velocity fluctuation of two points arranged either in streamwise, spanwise or lateral direction is measured by a two point LDV system specially designed for this experiment The data were used to calculated the correlation coefficients in three directions Conditional sampling (VITA) was employed to d...