An Approach for Fan Stage Conceptual Design with Non-Axisymmetric Stators in Presence of Distortion

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Pokhrel_Aviation2020_An_Approach_for_Fan_Stage_Conceptual_Design_with_Non_axisymmetric_Stators_in_Presence_of_Distortion.pdf (900.92 KB)
Author(s)
Pokhrel, Manish
Gladin, Jonathan
Denney, Russell K.
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Daniel Guggenheim School of Aerospace Engineering
The Daniel Guggenheim School of Aeronautics was established in 1931, with a name change in 1962 to the School of Aerospace Engineering
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http://hdl.handle.net/1853/62944
Abstract
Advances in the study of distortion warrant the consideration of non-axisymmetric flow field impacts on fan designs. The lack of a method that considers such impacts in early design motivates this work. An approach to design a fan stage in the presence of distortion is developed and illustrated here. In the proposed approach, an extension of the multi-meanline method accounts for flow asymmetry. Blade metal angles for the rotor are designed considering minimization of overall rotor losses in presence of incidence swings. Corrections to the quasi-steady rotor exit conditions provide an approximation to the unsteady rotor response. Non-axisymmetric stators are designed to reduce stage losses. The concept of Multi-Design Point (MDP) approach in the thermodynamic cycle designs inspires this work. This approach is envisioned as a method to approximate the design point of a fan stage under distorted flow conditions.
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2020-06
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