EntityQ2705141· pop 15· linked from 143 articlescompressible flowSign in to savebranch of fluid mechanicsConnectionshypersonic speedEntityisentropic processEntityPrandtl–Meyer expansion fanEntityLeonhard EulerEntityInternational Standard Book NumberEntitythermodynamicsEntitymass densityEntityconservation of energyEntityJoseph-Louis LagrangeEntityentropyEntityErnst MachEntityfrictionEntityfluid mechanicsEntityaerodynamicsEntityChristian DopplerEntityArchimedes' principleEntityheat transferEntityMach numberEntityhydraulicsEntityideal gas lawEntityCategoriesAerodynamicsFluid mechanics