Method of searching for thermal upward air flows based on a mathematical model of the thermophysical state of the nearby space of an unmanned aircraft

Аuthors

Ezhov A. D.^*, Shilov M. S., Gritchin D. M.

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: ezzhov@gmail.com

Abstract

This work is aimed at studying such atmospheric phenomenon as upward convective flows of air masses. Understanding the nature of this process will make it possible to use convective phenomena in the atmosphere as a source of energy for various aircraft. Methods for finding upstream flows are discussed, and an algorithm for utilizing the found flows is proposed. Some verification of the methods is also presented.

Keywords:

upward flow, unmanned aircraft, hovering, gliders, natural convection, neural networks

References

1. Mohamed A., Taylor G. K., Watkins S. et al. Opportunistic soaring by birds suggests new opportunities for atmospheric energy harvesting by flying robots. Journal of the Royal Society Interface, 2022, vol. 19 (196). ID 20220671.

2. Notter S., Müller G., Fichter W. Integrated Updraft Localization and Exploitation: End-to-End Type Reinforcement Learning Approach. Conference: CEAS EuroGNC 2022 (May 2022). Berlin, 2022. URL: https:// www.researchgate.net/publication/360463610Integrated_Updraft_Localization_and_Exploitation_End-to-En...

3. Martin S. Singh, Morgan E O’Neill. The climate system and the second law of thermodynamics. Reviews of Modern Physics, 2022, vol. 94. DOI: https://doi.org/10.1103/RevModPhys.94.015001

4. Gershuni G.Z., Zhukhovitsky E.M. Konvektivnaya ustojchivost’ neszhimaemoj zhidkosti [Convective stability of an incompressible fluid.]. Moscow: Izdatel’stvo “Nauka”, 1972, 392 p.

5. Sokolov A.N. Methodology of calculation of free convective heat exchange on solid surfaces in a wide temperature range. Scientific and Technical Bulletin of Information Technologies, Mechanics and Optic, 2012, no. 2 (78), pp. 88–91.

6. Nilton O. Renno, Jasper Kok. Electrical Activity and Dust Lifting on Earth, Mars, and Beyond. Space Science Reviews, 2008, vol. 137 (1–4), pp. 419–434.

7. Nilton Renno, Stephen Rogacki, Michael Parker et al. Detecting Thermals Remotely. 2008. URL: https://www.yumpu.com/en/document/view/47925759/detecting-thermals-remotely-aoss-research

8. Predelli О., Niederhagen R. Humidity, the Dominating Force of Thermal Updrafts. Preprint to Technical Soaring (TS), 2019, May 16, 14 p. URL: https://www.researchgate.net/publication/364757093_Humidity_the_Dominating_Force_of_Thermal_Updrafts

9. Tsilingiris P.T. Thermophysical and transport properties of humid air at temperature range between 0 and 100 °C. Energy Conversion and Management, 2008, vol. 49, pp. 1098–1110.

10. Chechin D.G., Artamonov A.Yu., Bodunkov N.E. et al. Experience of Studying the Turbulent Structure of the Atmospheric Boundary Layer Using an Unmanned Aerial Vehicle. Izvestiya, Atmospheric and Oceanic Physics, 2021, vol. 57, pp. 526–532. URL: https://doi.org/10.1134/S0001433821050042

11. Sreekanth Ganapathi Raju, Eric Poquillon, Emmanuel Rachelson. A Survey on Thermal Updraft Models. URL: https://websites.isaesupaero.fr/IMG/pdf/report.pdf