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Title: Dependence Of The Flow Velocity Field In Critical Nozzles On The Pressure Ratio
Author: Masahiro Ishibashi And Toshihiro Morioka
Source: Flomeko 2010
Year Published: 2010
Abstract: RTA (Recovery Temperature Anemometry), which estimates the flow velocity field based on the recovery temperature measured by a very thin thermocouple wire without disturbing the flow field, is introduced in the paper. Measurements of flow fields in critical nozzles by RTA reveal very interesting phenomena such as interaction of oblique shock system fixed on the nozzle geometry and a strong shock moving along the nozzle axis depending on the pressure ratio, which is considered to have a relationship with the premature unchoking phenomenon. Possibility to estimate the flow velocity distribution in the boundary layer is also discussed

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