Cylindrical three-hole pressure probe calibration for large angular range

摘要: Abstract This paper presents a brand new method to calibrate Cylindrical Three-Hole Probe (CTHP) in “non-nulling” operating mode. calibration employs the definition of normalization factor used coefficients probe. By means this normalization, singular points are prevented from appearing coefficients. In addition, angular range attainable when using is ±70 ∘ , while typical traditional approximately ±30 . To validate study, an uncertainty analysis probe carried out, resulting significantly low uncertainties for whole Complementarily, influence distance between holes on both and maximum also performed paper. From analysis, it established that optimal separation should be chosen 50 60 degrees. Finally, illustrate usefulness procedure, set experimental measurements were conducted downstream rotor axial turbomachine, CTHP with degrees holes. The results revealed complex, unsteady flow within blade passages can perfectly captured, including those regions high variations angle, like shear layers wake fluid or casing hub boundary layers. summary, newly developed enables measurement large particular, up 140 degrees, increasing 80 calibration.