Application of mathematical modeling to solve the emergency water landing task in the interests of passenger aircraft certification

Козелков, А. С.; Pogosyan, M. A.; Strelets, D. Yu.; Tarasova, N. V.

doi:10.1007/s42401-020-00082-7

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…The morfing method [33] is used to change the object's surface shape depending on the amount of ice on the surface. The LOGOS software package version number 5.3.21 was comprehensively verified and validated on well-known international tests [1,[34][35][36][37][38] and demonstrated good results. All the results given below were obtained using the LOGOS software package.…”

Section: Methodsmentioning

confidence: 99%

“…The numerical simulation, introduced as a stage of the design process to find optimum performance characteristics, allows for a reduction in design development time and cost, the scope of experimental investigations and flight tests, as well as simplifies the introduction of modifications to the design of air vehicles in the development stage [1,2]. The numerical simulation of ice accretion is an important aspect of the design process for ensuring the safety of aircraft, in particular, under cold weather conditions, where icing may cause serious problems [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Ice accretions on various surfaces may result in a lower airfoil lift force [5,6], a lower aerodynamic efficiency [7], and a lower visibility, thereby, complicating the air vehicle control for pilots. Experimental investigations reproducing ice accretion on solid surfaces of various aircraft are expensive, require much time, and do not allow studying the ice effect on the aerodynamic parameters of an aircraft in a short space of time [1]. Leading aerospace agencies in different countries are dealing with icing problems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Computational Investigation of the Water Droplet Effects on Shapes of Ice on Airfoils

Kozelkov,

Galanov,

Semenov

et al. 2023

Aerospace

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The paper presents the results of studying the effects of droplet diameters on the NACA0012 airfoil ice accretion, which have been obtained in the 3D numerical simulation of icing. To simulate the motion of water droplets as a multiphase medium, the Eulerian approach is used, which assumes that water droplets have spherical shapes, do not undergo deformation and breakup, do not interact with each other, and that coalescence/fragmentation of droplets does not take place. Both monodisperse (of the same size) and polydisperse (of various sizes) droplets are considered; they are represented by the spectral Langmuir distributions. These spectral distributions take into account the polydisperse nature of droplets and provide a higher efficiency in predicting ice shapes. The obtained ice shapes on an airfoil are compared with the available experimental and calculated data. It should be noted according to the simulation results that the use of the standard size of droplet diameter equal to 20 μm does not allow for obtaining correct shapes of ice on the leading edge of the wing profile not at all temperature regimes. For temperatures from −20 °C to −10 °C, there is a noticeable difference compared to the experimental data. At the same time, for this temperature range, the use of the Langmuir spectral distribution of droplet diameters relative to 15 μm provides a better agreement of the formed ice forms with the experiment.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Computational Investigation of the Water Droplet Effects on Shapes of Ice on Airfoils

Kozelkov,

Galanov,

Semenov

et al. 2023

Aerospace

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“…A full description of the model can be found in [11]. Calculations were carried out with the LOGOS software package [12][13][14][15][16][17].…”

Section: Model Implementation (Numerical Methods)mentioning

confidence: 99%

Numerical Study of the Influence of the Critical Reynolds Number on the Aerodynamic Characteristics of the Wing Airfoil

Utkina,

Kozelkov,

Zhuchkov

et al. 2023

Fluids

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The paper reports the results of a study concerned with the influence of the size of the leading edge laminar bubble on the aerodynamic characteristics of the HGR01 airfoil. The completely turbulent and transient flows are considered. The mechanism of the appearance and interaction of laminar and turbulent flow separation near the leading and trailing edges of the airfoil is studied in detail. In the paper, the dependence of aerodynamic forces on the critical Reynolds number for the HGR01 airfoil is discussed. It has been established that the separation bubble at the leading edge can only be obtained using the laminar–turbulent transition model. Fully turbulent models are not able to show this feature of the airfoil flow. Graphs of the lift coefficient as a function of the critical Reynolds number, as well as the pressure distribution as a function of the size of the laminar bubble, are shown.

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“…Most of the points are proved using static finite element (FE) calculation [3]. But the problems of proving some of the points are dynamic calculations [4,5]. Among all points, special attention should be paid to NLG25.721, which refers to avoiding damage to the aircraft fuel system during an emergency landing.…”

Section: Nlg25735 Brakes and Braking Systemsmentioning

confidence: 99%

Theoretical Model of the Methodology of Landing Gear Bracket Design Taking into Account the Adjusted Calculation for Shear Bolt Design

Titov,

Serebryansky

2023

E3S Web Conf.

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The subject of this paper is the methodology of main landing gear (MLG) design, in particular, the algorithm. The new algorithm considered in this paper is intended for designing modern structures of the MLG using a large number of methods of mathematical modelling of the stress-strain state and maximum autonomy of this process. The initial conditions of this algorithm are the Airworthiness Standards for Transport Category Airplanes (NLG25).

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Application of mathematical modeling to solve the emergency water landing task in the interests of passenger aircraft certification

Cited by 6 publications

References 16 publications

Computational Investigation of the Water Droplet Effects on Shapes of Ice on Airfoils

Computational Investigation of the Water Droplet Effects on Shapes of Ice on Airfoils

Numerical Study of the Influence of the Critical Reynolds Number on the Aerodynamic Characteristics of the Wing Airfoil

Theoretical Model of the Methodology of Landing Gear Bracket Design Taking into Account the Adjusted Calculation for Shear Bolt Design

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