UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (Whan Data Entered) 



(Block 20 continued) 



In addition to resistance experiments, transition regions on the models were located, using hot film 

 probes. Calculations predicted laminar separation on five of the model forebodies. The hot film 

 measurements confirmed that separation did occur at the locations predicted; downstream of the separation 

 locations, turbulent flow occurred immediately. The remaining four forebodies exhibited well-defined 

 natural transition regions. Flow properties in the transition regions, measured by the hot film gages, have 

 been compared with predicted spatial amplification ratios of disturbances, calculated by linear stability 

 theory. Results have failed to show a single relationship between measured flow properties and computed 

 spatial amplification ratios. Correlation of amplification factors with flow regimes varied, both with 

 forebody shape and Reynolds number. 



UNCLASSIFIED 



SECURITY CLASSIFICATION OF~THlS PAGEfWTien Data Entered) 



