Mathematical modeling of the NOTAR anti-torque system for flight simulation

Ilkay Yavrucuk, H. Murat Bakir, Oguz Uzol

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper makes an attempt to model the NOTAR anti-torque system of the MD600N helicopter for flight simulations. The model consists of the circulation control tail-boom, direct jet thruster and the vertical stabilizers. The airflow inside the tail-boom is modeled by dividing the flow into aerodynamic control volumes. The model features a blade element type approach for modeling the mass flow through the axial fan blades as well as aerodynamic mass and momentum conservation calculations in each control volume. The side force produced by the direct jet thruster and circulation control tail boom is calculated by the model at different flight conditions. A simple rectangular platform with symmetrical airfoil shape is used to model the vertical tail. The developed NOTAR anti-torque model is integrated with a nonlinear helicopter model. Flight tests are performed on the MD600N and the data obtained are used for verification. Results show a reasonable match between the model and flight test data in the anti-torque response in hover and forward flight to pilot pedal input.

Original languageEnglish
Pages (from-to)1663-1672
Number of pages10
JournalAnnual Forum Proceedings - AHS International
Volume3
StatePublished - 2010
Externally publishedYes
Event66th Forum of the American Helicopter Society: "Rising to New Heights in Vertical Lift Technology", AHS Forum 66 - Phoenix, AZ, United States
Duration: 11 May 201013 May 2010

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