Reattachment peak heat flow prediction method based on pressure gradient-heat flow correlation

The invention discloses a reattachment peak heat flow prediction method based on pressure gradient-heat flow correlation. The method comprises the following steps: S1, obtaining a separation point position xsep through a wind tunnel test; s2, calculating a pressure platform ppla, a pressure peak ppk and a separation bubble angle theta s of a flow field by a flow field structure prediction method based on a minimum dissipation principle; s3, calculating the characteristic length xint of a separation position and the characteristic length xp of a reattachment position based on the separation bubble angle theta s and the shear layer thickness obtained in the S2; s4, calculating a dimensionless heat flow Stoi corresponding to the reference point based on the xsep obtained in the S1; and S5, based on ppk and ppla obtained in the S2, xint and xp obtained in the S4 and Stoi obtained in the S4, calculating peak dimensionless heat flux Stpk in a corresponding state. The invention provides a reattachment peak heat flow