Abstract
2-D numerical nozzle flow simulations and cold gas sub scale nozzle experiments are conducted to gain a better understanding of the various mechanisms that cause heat loads in nozzles. The 2-D numerical simulations account for non-equilibrium chemistry and show post-combustion with the entrained ambient air but cannot sufficiently explain the wall heat loads observed in the experiments. Obviously, 2-D numerics lack the physics to explain 3-D phenomena. Hence, sub scale cold gas nozzle experiments are chosen to study unsteady and 3-D effects since they are more efficient, more realistic and less costly than unsteady 3-D computations. In addition to the common diagnosis tools an infrared camera is used to visualize wall heat loads. These experimentes yield 3-D streamwise structures reminiscent of Gortler vortices which may have a significant effect on the wall heat loads.
Original language | English |
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State | Published - 2001 |
Externally published | Yes |
Event | 37th Joint Propulsion Conference and Exhibit 2001 - Salt Lake City, UT, United States Duration: 8 Jul 2001 → 11 Jul 2001 |
Conference
Conference | 37th Joint Propulsion Conference and Exhibit 2001 |
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Country/Territory | United States |
City | Salt Lake City, UT |
Period | 8/07/01 → 11/07/01 |