Airplane Landing Performance on Contaminated Runways in Adverse Conditions

Daidzic, Nihad E.; Shrestha, Juna

doi:10.2514/1.38056

Cited by 23 publications

(39 citation statements)

References 8 publications

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“…First, after touchdown, the pilot does not use brakes in order to prevent the wheels from skidding [19]. Further, constant horizontal speed was used, and the aircraft will land with all of the main wheels and zero wing lift [20,21]. Moreover, the maximum aircraft landing weight was used.…”

Section: Modeling and Simulationmentioning

confidence: 99%

Aircraft Tire Temperature at Touchdown with Wheel Prerotation

Alroqi

Wang

Zhao

2017

Journal of Aircraft

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Section: Modeling and Simulationmentioning

confidence: 99%

Aircraft Tire Temperature at Touchdown with Wheel Prerotation

Alroqi

Wang

Zhao

2017

Journal of Aircraft

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“…This is a crucial step in predicting aircraft performance and economy of operation, and in designing best piloting technique practices (Daidzic, 2008).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Performance Airspeeds for High-Bypass Turbofans Equipped Transport-Category Airplanes

Daidzic¹

2016

Journal of Aviation Technology and Engineering

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Conventional Mach-independent subsonic drag polar does not replicate the real airplane drag characteristics exactly and especially not in the drag-divergence region due to shock-induced transonic wave drag. High-bypass turbofan thrust is a complicated function of many parameters that eludes accurate predictions for the entire operating envelope and must be experimentally verified. Fuel laws are also complicated functions of many parameters which make optimization and economic analysis difficult and uncertain in the conceptual design phase. Nevertheless, mathematical models and predictions have its important place in aircraft development, design, and optimization. In this work, airspeed-dependent turbofan thrust and the new fuel-law model were used in combination with an airplane polynomial drag model to estimate important performance speeds. Except for the airframe-only dependent control airspeeds, all performance speeds are airframepowerplant dependent. In all analytical considerations one ends up with polynomials of the 4 th order that have no closed-form solutions. A real positive-root seeking numerical procedure based on the family of Newton-Raphson methods was used to extract performance airspeeds for variable in-flight weights and altitudes in the ISA troposphere. Extensive testing of the accuracy and convergence of the Newton-Raphson nonlinear equation solvers was conducted before performance speed calculations. A fictitious long-range wide-body transport-category airplane was modeled in combination with a pair of high-bypass and ultra-high bypass ratio flat-rated turbofans. Procedure employed here can be easily extended to cases when fitted, measured drag and thrust data is given in arbitrary polynomial forms. Sensitivity analysis is performed on minimum-drag airspeed and maximum aerodynamic efficiency. Transonic wave drag considerations are introduced. About the AuthorsDr. Nihad E. Daidzic is president of AAR Aerospace Consulting, LLC. He is also a full professor of aviation, adjunct professor of mechanical engineering, and research graduate faculty at Minnesota State University. He has a PhD in fluid mechanics and ScD in mechanical engineering. He was formerly a staff scientist at the National Center for Microgravity Research and the National Center for Space Exploration and Research at NASA Glenn Research Center in Cleveland, OH. He has also held various faculty appointments at Vanderbilt University, University of Kansas, and Kent State University. His current research interest is in theoretical, experimental, and computational fluid dynamics; micro-and nano-fluidics; aircraft stability, control, and performance; and mechanics of flight, piloting techniques, and aerospace propulsion. Dr. Daidzic is ATP and ''Gold Seal'' CFII/MEI/CFIG certified with flight experience in airplanes, helicopters, and gliders.

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“…Aircraft operators provided experience and data for investigators [3]. Rubber tires for vehicles and their friction behaviours are still attractive topics [4][5][6][7][8][9]. Some have intensively investigated rubber combustion [10].…”

Section: Introductionmentioning

confidence: 99%