Methodology for the Track Tests Ensuring of New Aircraft Models at Ultra-High Speeds

Аuthors

Astakhov S. A.

Scientific Test Range of Aviation Systems named after L.K. Safronov, Beloozersky settlement, Voskresensky district, Moscow region, Russia

e-mail: info@gknipas.ru

Abstract

Development of the new aircraft samples defines the need for increasing the flight speeds to solve the problems of their effective application for the intended purpose.
To solve the scientific problem on achieving ultra-high speeds and ensuring the test object functioning during the track tests, the author proposes the methodology, consisting of the following stages.
1. Preliminary substantiation of the “track carriage-test object” system options and its components; the rail track state and the track test scheme determining (in accordance with the terms of reference for the tests).
2. Defining the force impacts acting on the “track carriage-test object” system while its movement along the rail track.
3. Studying the speedup possibility of the tested object up to the specified speeds, and ensuring parameters of its functioning while its application in various design styles.
The possibility of employing technical, technological and design solutions to achieve the specified test parameters is being assessed at this stage as well. With this, the following procedures are being performed:
- a set of solutions for creating a section of a rail track with an experimental sample of a device for the medium parameters changing;
- a set of solutions for ensuring the test information storing under the high-speed traffic conditions.
4. Theoretical studies of the dynamic “track carriage-test object” system vibrations.
5. Numerical study of the “track carriage-test object” system state during its movement along the rail track.
At this stage, simulation of the rocket carriage movement with a test object along the rail track is being performed with account for the force impacts acting on the track carriage-test object system, including those under conditions of an environment with reduced density. With this, aerodynamic flow-around is being simulated and aerodynamic characteristics of the system are being determined.
Simulation is being performed with:
- models of the movement dynamics of the “track carriage-test object” system of an arbitrary layout;
- method of the aerodynamic characteristics numerical computing at non-stationary flow-around of the “track carriage-test object” system of an arbitrary layout with account for the variable parameters of the environment.
6. Experimental studies of vibration impacts on the dynamic “track carriage-test object” system of arbitrary layout during the high-speed track tests.
7. Conducting track tests of aircraft at ultra-high speeds.
The track tests technique is being developed with the proposed methodology based on the requirements of the terms of reference and may fully or partially reflect the above said stages.
The new technical, technological and design solutions obtained while this methodology development allow ensuring the ultra-high speeds achieving while track tests of the promising aircraft and its functioning in the area of application.

Keywords:

ground track tests, rail track, experimental track installation, ground tests at ultra-high speeds, object aerodynamic flow-around modeling, external environment of various density, helium-air environment, track carriage movement dynamics, vibration impacts at track tests

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