In a round tubulent jet at room temperature, measurement of the shear correlation coefficient as a function of frequency (through band-pass Jitters) has given a rather direct verification of Kolmogoroff’s local-isotropy hypothesis. One-dimensional power spectra of velocity and temperature fluctuations, measured in unheated and heated jets, respectively, have been contrasted. Under the same conditions, the two cor¬responding transverse correlation functions have been measured and compared.
展开▼
