Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics

This paper focuses on estimating dynamic stability derivatives using a computational fluid dynamics (CFD)-based force oscillation method, and on separating the coupled dynamic derivatives terms obtained from the method. A transient RANS solver is used to calculate the time history of aerodynamic mom...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Nadhie Juliawan, Hyoung-Seog Chung, Jae-Woo Lee, Sangho Kim
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	dynamic stability derivatives forced oscillation computational fluid dynamics Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/cb2de15c228d4320b8999df008b6c4b4
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:cb2de15c228d4320b8999df008b6c4b4
record_format	dspace
spelling	oai:doaj.org-article:cb2de15c228d4320b8999df008b6c4b42021-11-25T15:57:51ZEstimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics10.3390/aerospace81103542226-4310https://doaj.org/article/cb2de15c228d4320b8999df008b6c4b42021-11-01T00:00:00Zhttps://www.mdpi.com/2226-4310/8/11/354https://doaj.org/toc/2226-4310This paper focuses on estimating dynamic stability derivatives using a computational fluid dynamics (CFD)-based force oscillation method, and on separating the coupled dynamic derivatives terms obtained from the method. A transient RANS solver is used to calculate the time history of aerodynamic moments for a test model oscillating about the center of gravity, from which the coupled dynamic derivatives are estimated. The separation of the coupled derivatives term is carried out by simulating simple harmonic oscillation motions such as plunging motion and flapping motion which can isolate the pitching moment due to AOA rate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>C</mi><mrow><msub><mi>m</mi><mover accent="true"><mi>α</mi><mo>˙</mo></mover></msub></mrow></msub></mrow></semantics></math></inline-formula>) and the pitching moment due to pitch rate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>C</mi><mrow><msub><mi>m</mi><mi>q</mi></msub></mrow></msub></mrow></semantics></math></inline-formula>), respectively. The periodic motions are implemented using a CFD dynamic mesh technique with user-defined function (UDF). For the validation test, steady and unsteady simulations are performed on the Army-Navy Finner Missile model. The static aerodynamic moments and pressure distribution, as well as the coupled dynamic derivative results from the pitching oscillation mode, show good agreement with the previously published wind tunnel tests and CFD analysis data. In order to separate the coupled derivative terms, two additional harmonic oscillation modes of plunging and flapping motions are tested with the angle of attack variations from 0 to 85 degrees at a supersonic speed to provide real insight on the missile maneuverability. The cross-validation study between the three oscillation modes indicates the summation of the individual plunging and flapping results becoming nearly identical to the coupled derivative results from the pitching motion, which implies the entire set of coupled and separated dynamic derivative terms can be effectively estimated with only two out of three modes. The advantages and disadvantages of each method are discussed to determine the efficient approach of estimating the dynamic stability derivatives using the forced oscillation method.Nadhie JuliawanHyoung-Seog ChungJae-Woo LeeSangho KimMDPI AGarticledynamic stability derivativesforced oscillationcomputational fluid dynamicsMotor vehicles. Aeronautics. AstronauticsTL1-4050ENAerospace, Vol 8, Iss 354, p 354 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dynamic stability derivatives forced oscillation computational fluid dynamics Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	dynamic stability derivatives forced oscillation computational fluid dynamics Motor vehicles. Aeronautics. Astronautics TL1-4050 Nadhie Juliawan Hyoung-Seog Chung Jae-Woo Lee Sangho Kim Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics
description	This paper focuses on estimating dynamic stability derivatives using a computational fluid dynamics (CFD)-based force oscillation method, and on separating the coupled dynamic derivatives terms obtained from the method. A transient RANS solver is used to calculate the time history of aerodynamic moments for a test model oscillating about the center of gravity, from which the coupled dynamic derivatives are estimated. The separation of the coupled derivatives term is carried out by simulating simple harmonic oscillation motions such as plunging motion and flapping motion which can isolate the pitching moment due to AOA rate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>C</mi><mrow><msub><mi>m</mi><mover accent="true"><mi>α</mi><mo>˙</mo></mover></msub></mrow></msub></mrow></semantics></math></inline-formula>) and the pitching moment due to pitch rate (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>C</mi><mrow><msub><mi>m</mi><mi>q</mi></msub></mrow></msub></mrow></semantics></math></inline-formula>), respectively. The periodic motions are implemented using a CFD dynamic mesh technique with user-defined function (UDF). For the validation test, steady and unsteady simulations are performed on the Army-Navy Finner Missile model. The static aerodynamic moments and pressure distribution, as well as the coupled dynamic derivative results from the pitching oscillation mode, show good agreement with the previously published wind tunnel tests and CFD analysis data. In order to separate the coupled derivative terms, two additional harmonic oscillation modes of plunging and flapping motions are tested with the angle of attack variations from 0 to 85 degrees at a supersonic speed to provide real insight on the missile maneuverability. The cross-validation study between the three oscillation modes indicates the summation of the individual plunging and flapping results becoming nearly identical to the coupled derivative results from the pitching motion, which implies the entire set of coupled and separated dynamic derivative terms can be effectively estimated with only two out of three modes. The advantages and disadvantages of each method are discussed to determine the efficient approach of estimating the dynamic stability derivatives using the forced oscillation method.
format	article
author	Nadhie Juliawan Hyoung-Seog Chung Jae-Woo Lee Sangho Kim
author_facet	Nadhie Juliawan Hyoung-Seog Chung Jae-Woo Lee Sangho Kim
author_sort	Nadhie Juliawan
title	Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics
title_short	Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics
title_full	Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics
title_fullStr	Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics
title_full_unstemmed	Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics
title_sort	estimation and separation of longitudinal dynamic stability derivatives with forced oscillation method using computational fluid dynamics
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/cb2de15c228d4320b8999df008b6c4b4
work_keys_str_mv	AT nadhiejuliawan estimationandseparationoflongitudinaldynamicstabilityderivativeswithforcedoscillationmethodusingcomputationalfluiddynamics AT hyoungseogchung estimationandseparationoflongitudinaldynamicstabilityderivativeswithforcedoscillationmethodusingcomputationalfluiddynamics AT jaewoolee estimationandseparationoflongitudinaldynamicstabilityderivativeswithforcedoscillationmethodusingcomputationalfluiddynamics AT sanghokim estimationandseparationoflongitudinaldynamicstabilityderivativeswithforcedoscillationmethodusingcomputationalfluiddynamics
_version_	1718413406454677504

Estimation and Separation of Longitudinal Dynamic Stability Derivatives with Forced Oscillation Method Using Computational Fluid Dynamics

Ejemplares similares