CARACTÉRISTIQUES DE TURBULATEUR ET DE NERVURE D'ÉCHANGEUR THERMIQUE POUR UNE MEILLEURE APTITUDE À LA FABRICATION ET DE MEILLEURES PERFORMANCES

摘要

An additively-manufactured heat exchanger includes fluidly-separated alternating first and second layers (62, 64)having respective flow channels (74, 78) which can include one or more features that is either a riblet (32) or a turbulator (42). A riblet includes a riblet peak (34) and/or a riblet valley (3 8), which has a riblet slope (36), and the riblet peak and/or riblet valley has a riblet axis (33) that is generally parallel to either the first fluid flow direction or the second fluid flow direction. A turbulator (42) includes a turbulator peak (44) and/or a turbulator valley (48), which has a turbulator slope (46), and the turbulator peak and/or turbulator valley has a turbulator axis (43) that is generally perpendicular to either the first fluid flow direction or the second fluid flow direction. The respective slope angles are generally 25 - 65 deg. relative to build-axis, thereby resulting in improved surface roughness and uniformity control during the build process.