Steady base flows

Effect of the boundary layer on the base pressure in a two-dimensional flow with a Mach number M = 5

“…Let us now consider how our measurement results agree with calculations by Tanner's theory [6]. This model was chosen for comparisons with experimental data owing to its universality.…”

“…In [6], Tanner derived relations for determining the drag coefficient of axisymmetric and two-dimensional bodies of different geometry for subsonic, transonic, and supersonic flow velocities with allowance for the boundary-layer effect. Based on the data given in [6], the calculated results offer a fairly accurate description of experimentally obtained dependences of the drag coefficient on the Mach number and boundary-layer thickness. Yet, the model was mainly tested against experimental results in the range of Mach numbers M 3.…”

“…This problem is discussed in the present paper, which describes detailed measurements of the base pressure on the edge of a two-dimensional body in a supersonic flow with a Mach number M = 5 in a wide range of variation of the boundary-layer thickness at the exit, up to δ/(t/2) = 3.2. The experimental data obtained are used to test Tanner's numerical model [5][6][7], which, in contrast to other known numerical methods (see, e.g., [1][2][3][4]) claims that it can predict the base drag for bodies of different geometries for arbitrary values of M and δ/(t/2), and which was previously tested at lower Mach numbers.Setup, Models, and Measurement Technique. The base pressure was measured at the edge of a nozzle blade in the course of extensive studies of the flow structure formed by a block of two-dimensional supersonic nozzles [8] (as applied to the problem of optical quality of the active medium of the gas-dynamic laser [9, 10]).…”

Heat transfer measurements in a supersonic wind tunnel through inverse temperature data reduction: application to a backward facing step

“…Indeed, formulas to predict the base pressure in laminar and turbulent compressible separating flows has been developed since the early works by Chapman [8] and Korst [9], which match fairly well with the experiments at least in the high Reynolds number range, when the assumption of negligible boundary layer thickness underlying those methods is applicable. Several authors later gave significant contributions, whether extending the original findings of Chapman and Korst or following quite different approaches, as the theory of Tanner [10] correlating the base pressure to the entropy variation.…”

“…but not limited to [8][9][10]), experimental (e.g. but not limited to [11][12][13][14]) and numerical (e.g.…”