TY - JOUR
T1 - Aerothermodynamic analyses and redesign of GHIBLI Plasma Wind Tunnel hypersonic diffuser
AU - Agostinelli, Pasquale Walter
AU - Trifoni, Eduardo
AU - Savino, Raffaele
N1 - Publisher Copyright:
© 2019 Elsevier Masson SAS
PY - 2019/4
Y1 - 2019/4
N2 - This article deals with the aerothermodynamic analyses of the hypersonic diffuser of GHIBLI Plasma Wind Tunnel at CIRA (Centro Italiano Ricerche Aerospaziali). This diffuser presented an unexpected behavior not ensuring nozzle under-expanded flow in test chamber, even in several free jet conditions. This experimental evidence was investigated following two approaches. First, a literature review pointed out that the design rules, generally recommended in supersonic diffusers design, were not observed in the case of GHIBLI diffuser. Second, a simplified numerical model was introduced and validated with experimental results, performing Computational Fluid Dynamics analyses of GHIBLI diffuser. Finally, in order to enhance the pressure recovery and to obtain the desired under-expanded conditions, two new candidate designs compliant with the literature recommended values have been proposed and analyzed via CFD.
AB - This article deals with the aerothermodynamic analyses of the hypersonic diffuser of GHIBLI Plasma Wind Tunnel at CIRA (Centro Italiano Ricerche Aerospaziali). This diffuser presented an unexpected behavior not ensuring nozzle under-expanded flow in test chamber, even in several free jet conditions. This experimental evidence was investigated following two approaches. First, a literature review pointed out that the design rules, generally recommended in supersonic diffusers design, were not observed in the case of GHIBLI diffuser. Second, a simplified numerical model was introduced and validated with experimental results, performing Computational Fluid Dynamics analyses of GHIBLI diffuser. Finally, in order to enhance the pressure recovery and to obtain the desired under-expanded conditions, two new candidate designs compliant with the literature recommended values have been proposed and analyzed via CFD.
KW - Aerothermodynamic design
KW - Hypersonic diffuser
KW - Plasma wind tunnel
UR - http://www.scopus.com/inward/record.url?scp=85062284931&partnerID=8YFLogxK
U2 - 10.1016/j.ast.2019.02.023
DO - 10.1016/j.ast.2019.02.023
M3 - Article
SN - 1270-9638
VL - 87
SP - 218
EP - 229
JO - Aerospace Science and Technology
JF - Aerospace Science and Technology
ER -