Heat and mass transfer in thermal protection composite materials upon high temperature loading

Формалев, В. Ф.; Колесник, С. А.; Kuznetsova, Ekaterina; Rabinskii, L. N.

doi:10.1134/s0018151x16020036

Cited by 26 publications

(14 citation statements)

References 2 publications

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“…The slogan "to fly the fastest and farthest" has received an economic connotation in the 21st century. It is necessary to fly wherever it is necessary, and so it should be fast, cheap and most importantly comfortable [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. This is the nature of today's demands.…”

Section: Introductionmentioning

confidence: 99%

Influence of Passenger Comfort Requirements on the Interior Layout of Long-Haul Aircraft

Kuprikov¹,

Orekhov²,

Shulga³

et al. 2021

cea

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The plane has become a convenient method of transportation. The main idea of aviation in the 21st century is the safety of passengers and crew, but the human is always inclined towards comfort. The structural and parametric analysis of the long-haul aircraft development made it possible to form the concept of the fuselage layout with capsule accommodation of passengers. By adding the third axis to the dimension of the aircraft expressed in take-off mass, it clearly showed the ultimate dimension of the aircraft, expressed by modern infrastructural constraints. The histogram of the distribution of flights between the largest airports in the world that can operate with long-haul aircraft was showed. The distribution of large airports was characterised by the demographic factor. The proposed variant of the capsule accommodation, designed for the Boeing 777-200LR, can be installed in other passenger airliners with a ceiling height of at least 2.1 m. Analysis of alternative options for the layout of the passenger compartment allows us to state: with a flight range of more than 8 hours, the flight is comfortable only in business or first classes. The proposed two-story capsule placement allows providing the layout with first-class seats in a given cabin.

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Section: Introductionmentioning

confidence: 99%

Influence of Passenger Comfort Requirements on the Interior Layout of Long-Haul Aircraft

Kuprikov¹,

Orekhov²,

Shulga³

et al. 2021

cea

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show abstract

“…With respect to the anisotropic theory of thermal conductivity, including in the composite materials, it is possible to distinguish the works (Formalev, 2001;Formalev and Kolesnik, 2007;Formalev et al, 2009;Formalev and Kolesnik, 2013;Formalev et al, 2016a;Formalev et al, 2016b;Formalev et al, 2018a). With respect to the coupled problems of the boundary layer and thermal conductivity, including the anisotropic one, one can cite works (Formalev et Gidaspov et al, 2018;Formalev et al, 2018b;).…”

Section: Introductionmentioning

confidence: 99%

Approximate Analytical Solution of the Problem of Conjugate Heat Transfer Between the Boundary Layer and the Anisotropic Strip

Формалев¹,

Колесник²,

Kuznetsova³

2019

PTQ

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Optimization of technological processes in metallurgy related to transfer and use of heat energy makes more complicated demands for calculation of heat exchange. Therefore, the work, the approximate analytical method for solving the conjugate problems of viscous gas-dynamic boundary layer and thermal conductivity in the anisotropic strip, has been developed. The paper uses modern numerical methods for solving differential equations in partial derivative and analytic methods on the basis of an integral transform of Fourier and Laplace. Boundary equations have been solved analytically with certain simplifications, and the problem of anisotropic heat conduction has been solved analytically. The heat flows are determined analytically by the longitudinal variable at the interface boundary. It has been established that temperature increase of the external surface contributes to that all factors directly impacting on the magnitude of heat flows act towards their reduction. The analytical solution for the problem of thermal conductivity in the anisotropic strip with a general type of anisotropy when the heat flows from the boundary layer are determined at the boundaries is obtained. The conducted research for the temperature of external boundary and heat flow from gas to it demonstrates that with increasing the degree of longitudinal anisotropy the surface temperature of the strip downstream increases from increasing longitudinal heat conduction An original conjugation method using the continuous heat flows, and temperatures at the interface boundary is found. The numerical results for the heat flows and temperatures at the interface boundary have been obtained and analyzed.

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“…They are related with (i) a necessity to simulate the multidimensional problems only, (ii) the fact that heat conduction in such cases is described by tensors of rank two rather than by scalars, which involves presence of mixed derivatives in the equations of heat conduction, and (iii) absence of information about publications on formulation of edge conditions with derivatives at the boundaries of anisotropic media. The development of theory of heat conduction in anisotropic bodies was considered in two monographs [1] and [2] by one of the authors of the present article, as well as in a section of the monograph by Carslaw and Jaeger [3] and in a number of publications (see, e.g., [4], [5] and [6]) by the authors of the present article. However, we do not know the works on the theory of heat conduction in anisotropic regions with discontinuous thermal-physical characteristics (TPC).…”

Section: Introductionmentioning

confidence: 99%

On the Features of Heat Transfer in Anisotropic Regions With Discontinuous Thermal-Physical Characteristics

Формалев¹

2016

Int. J. of Pure and Appl. Math.

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The authors simulate heat transfer in multilayer regions with anisotropic transfer characteristics. Heat conduction of each layer is described with a heat conduction tensor, so that both tensor components and the angles orientating the principal axes of heat conduction tensors become discontinuous at the boundaries of layer mating. It is determined that normal components of the heat flux density vector as well as temperature are continuous at the above boundaries, while tangential components may be discontinuous (i.e., the heat flux density vector is discontinuous at the boundaries between layers). The obtained form of normal component of the heat flux density vector for a free curvilinear boundary of the anisotropic region is suitable for application of economical numerical methods. To illustrate, the economical absolutely stable method of variable directions with extrapolation (developed by the authors) is applied. We discuss the results of numerical simulation that confirm continuity of

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Heat and mass transfer in thermal protection composite materials upon high temperature loading

Cited by 26 publications

References 2 publications

Influence of Passenger Comfort Requirements on the Interior Layout of Long-Haul Aircraft

Influence of Passenger Comfort Requirements on the Interior Layout of Long-Haul Aircraft

Approximate Analytical Solution of the Problem of Conjugate Heat Transfer Between the Boundary Layer and the Anisotropic Strip

On the Features of Heat Transfer in Anisotropic Regions With Discontinuous Thermal-Physical Characteristics

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