TY - JOUR

T1 - Experimental and numerical investigation of the recovery ratio of a wedge-shaped hot-film probe

AU - Krause, M.

AU - Gaisbauer, U.

AU - Kraemer, E.

AU - Kosinov, A. D.

PY - 2017/3/1

Y1 - 2017/3/1

N2 - The recovery ratio of a wedge-shaped hot-film probe was determined in an experimental as well as numerical study, since this information is still unpublished and essential for using the probe in hot-film anemometry. The experiments were conducted at the Khristianovich Institute of Theoretical and Applied Mechanics (ITAM) in Novosibirsk, Russia, and the simulations were performed with StarCCM+, a commercial 2nd order finite volume code. In the analysis, the Mach number was varied between M = 2 and M = 4, and the unit Reynolds number ranged from Re1 = 3.8•106 to Re1 = 26.1•106 m−1, depending on the Mach number. During the experiment, the stagnation temperature was kept constant for each Mach number at a separate value in the range of T0 = 289 ± 7 K. Three different stagnation temperatures were used in the simulations: T0 = 259 K, T0 = 289 K, and T0 = 319 K. The difference between the experimental and the numerical results is ≤ 0.5 %, and, therefore, both are in very good accordance. The influence of the Mach number, of the unit Reynolds number, and of the stagnation temperature was analysed, and three different fitting functions for the recovery ratio were established. In general, the recovery ratio shows small variations with all three tested parameters. These dependencies are of the same order of magnitude.

AB - The recovery ratio of a wedge-shaped hot-film probe was determined in an experimental as well as numerical study, since this information is still unpublished and essential for using the probe in hot-film anemometry. The experiments were conducted at the Khristianovich Institute of Theoretical and Applied Mechanics (ITAM) in Novosibirsk, Russia, and the simulations were performed with StarCCM+, a commercial 2nd order finite volume code. In the analysis, the Mach number was varied between M = 2 and M = 4, and the unit Reynolds number ranged from Re1 = 3.8•106 to Re1 = 26.1•106 m−1, depending on the Mach number. During the experiment, the stagnation temperature was kept constant for each Mach number at a separate value in the range of T0 = 289 ± 7 K. Three different stagnation temperatures were used in the simulations: T0 = 259 K, T0 = 289 K, and T0 = 319 K. The difference between the experimental and the numerical results is ≤ 0.5 %, and, therefore, both are in very good accordance. The influence of the Mach number, of the unit Reynolds number, and of the stagnation temperature was analysed, and three different fitting functions for the recovery ratio were established. In general, the recovery ratio shows small variations with all three tested parameters. These dependencies are of the same order of magnitude.

KW - CFD simulation

KW - experiment

KW - recovery ratio

KW - wedge-shaped hot-film probe

UR - http://www.scopus.com/inward/record.url?scp=85021180220&partnerID=8YFLogxK

U2 - 10.1134/S0869864317020044

DO - 10.1134/S0869864317020044

M3 - Article

AN - SCOPUS:85021180220

VL - 24

SP - 187

EP - 202

JO - Thermophysics and Aeromechanics

JF - Thermophysics and Aeromechanics

SN - 0869-8643

IS - 2

ER -