 superson flow surfac circular cone angl attack superson flow surfac circular cone angl attack formula inviscid flow properti surfac cone angl attack deriv conjunct cone tabl formula base entropi distribut cone surfac uniform equal shock fluid windward meridian plane predict valu flow variabl differ correspond valu directli cone tabl differ magnitud flow variabl comput method tend increas increas free-stream mach number cone angl angl attack 