{ "item_title" : "Theoretical Determination of Axial Fan Performance", "item_author" : [" E. Struve", "Nasa Technical Reports Server (Ntrs) "], "item_description" : "The report presents a method for the computation of axial fan characteristics. The method is based on the assumption that the law of constancy of the circulation along the blade holds, approximately, for all fan conditions for which the blade elements operate at normal angles of attack (up to the stalling angles). Pressure head coefficient K(sub a) and power coefficient K(sub u) for the force components in the axial and tangential directions, respectively, and analogous to the lift and drag coefficients C(sub y) and C(sub x) are conveniently introduced.", "item_img_path" : "https://covers3.booksamillion.com/covers/bam/1/28/726/561/1287265618_b.jpg", "price_data" : { "retail_price" : "20.75", "online_price" : "20.75", "our_price" : "20.75", "club_price" : "20.75", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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