RU27372U1 - TAIL OF A VEHICLE OR ITS SPEAKING PARTS - Google Patents

Description

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TAIL OF A VEHICLE OR ITS SPEAKING PARTS.

The utility model relates to the construction of vehicles of aircraft (including missiles), water transport (including submarines and torpedoes), as well as land transport and can be used to reduce environmental resistance when moving in it.

Known, for example, are the tail fairings of aircraft fuselages (L.A.) or its protruding parts, designed to reduce drag during movement in the air stream, for example, the tail fairings of aircraft TU-154, Yak-40, Yak-42 (Belyaev V. V., Ilyin V.E. Russian Modern Aviation.Astrel Publishing House, Moscow, 2001, p. 293, 311, 316), any of which can be selected as a prototype. Generators of the rear fuselage L.A. or its protruding parts in the flow sections are made in the form of smooth convex curves. The proposed design of the tail also has sections in the form of smooth convex curves.

An urgent task of the known structures is to reduce the resistance to movement of the environment surrounding the vehicle, including by reducing the resistance of the rear parts.

The proposed technical solution solves the problem of reducing the resistance to movement of the environment surrounding the vehicle.

To achieve the technical result, the tail part of the vehicle or its protruding parts, the generators of which in flow sections contain sections in the form of smooth convex curves, additionally contains sections of the generators in the form of smooth concave curves, with a smooth transition between sections having different signs of curvature (S - shaped curves).

A distinctive feature of the proposed tail fairings is that their generators in the flow sections additionally contain sections of the generators in the form of smooth concave curves, with a smooth transition between areas having a different sign of curvature.

Due to the presence of this distinguishing feature, the following technical result is achieved - the tail fairing allows

provide a greater degree of reduction in the coefficient of resistance x in comparison with the prototype, which increases the aero (hydro) -dynamic characteristics of the vehicle.

IPC B64C 23/00, B62D 35/00, B63B 1732, F42B 15/00, F42B 19/00,

was found. Thus, the present invention meets the eligibility criterion of “new.

The proposed technical solution can find application in the construction of various vehicles - air, water and land transport.

The utility model is illustrated by the drawings of FIG. 1-3.

Pa fig. 1 shows an abundance of views of the proposed solution for the tail fairing of an aircraft type TU-154 (dashed line shows the contours of the traditional tail fairing).

Pa fig. 2 shows a general view of the proposed solution for the stern of the vessel.

Pa fig. 3 shows an abundance of views of the proposed solution for the car.

Presented in FIG. 1-3 tail fairings are formed in flow sections by sections of smooth convex curves 1, changing the sign of curvature at the intermediate point 2 and passing into the sections of smooth concave curves 3.

Presented in FIG. 1-3 device works as follows. When the tail fairing flows continuously around the air stream behind section 1 and point 2 in section 3, forces (centrifugal forces) having a component directed to

the direction of movement of L.A., which reduces the drag coefficient

Possibility of providing continuous flow and reduction

minimum resistance coefficient L.A. was confirmed by experimental studies of aircraft in a wind tunnel. During such studies, the optimal curvatures in sections 1 and 3 were selected for the operating speed range

position of point 2, etc. At the same time, a reduction of --jcmm by 10% was achieved. Similar work can be carried out for other types of vehicles.

Claims (1)

The tail part of the vehicle or its protruding parts, the generators of which in the flow sections contain sections in the form of smooth convex curves, characterized in that the generators in the flow sections behind the sections of smooth convex curves further comprise sections in the form of smooth concave curves, with a smooth transition between the sections, having a different sign of curvature.