Abstract

The flow characteristics of lower reverser jets in ground effect were investigated on an advanced fighter aircraft model using flow visualization techniques Initial testing, with noncanted reverser jets, showed that aircraft velocity at ingestion onset was close to touchdown velocity However, the introduction of outboard jet cant significantly reduced the ingestion onset velocity For example canting the jets outboard by 30 deg reduces this velocity by half A data set is presented which can be used to predict reverser efflux penetration over a range of jet axial and cant angles for models of similar configuration

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