The UDF contrarotating propfan has been subjected to scale model wind tunnel testing to ascertain both general performance and acoustic characteristics data bases. Model Propulsion Simulator test rigs able to mount contrarotating fan blades of up to 24.5-inch diameter were used, and one of these was installed in a large anechoic test chamber for acoustic measurement of conditions simulating representative takeoffs, power cutbacks, and landing approaches. Attention is presently given to the data acquisition/reduction systems, the scaling criteria used to obtain engine size acoustic data, and comparisons with demonstrator aircraft in-flight acoustic test results.


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    Title :

    Scale model acoustic testing of counterrotating fans


    Contributors:
    Janardan, B. A. (author) / Chuang, S. (author) / Ho, P. Y. (author) / Lee, R. (author)

    Conference:

    Aerodynamic Testing Conference ; 1988 ; San Diego, CA, United States


    Publication date :

    1988-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Scale model acoustic testing of counterrotating fans

    JANARDAN, B. / CHUANG, S. / HO, P. et al. | AIAA | 1988





    Performance and Acoustic Prediction of Counterrotating Propeller Configurations

    Denner, B.W. / Korkan, K.D. | SAE Technical Papers | 1989