On the Temperatures of Aerodynamic Heating of Spherical Microparticles Modeling Microbiological Objects Entering the Earth’s Atmosphere at Cosmic Velocities
{"title":"On the Temperatures of Aerodynamic Heating of Spherical Microparticles Modeling Microbiological Objects Entering the Earth’s Atmosphere at Cosmic Velocities","authors":"E. K. Kolesnikov, S. V. Chernov","doi":"10.1134/s001095252460029x","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A mathematical model has been developed describing the motion in near–Earth space (NES) and aerodynamic heating upon entry into the atmosphere of spherical microparticles of carbon (graphite) with radii from 0.5 to 3 μm, modeling spores of terrestrial bacteria, as well as spores of hypothetical bacteria of extraterrestrial origin. The model is based on a joint numerical solution of the equations of motion in the NES of the specified model microbiological object (MBO) and the heat balance equation describing the change in the internal energy of the MBO. The calculated data obtained show that the maximum temperatures of aerodynamic heating of spores of terrestrial bacteria separating from the surfaces of large low-orbit objects of artificial origin are significantly lower than the maximum temperature of survival of spores of terrestrial bacteria during pulsed heating. In addition, the results of numerical experiments give grounds for the assumption that the spores of hypothetical extraterrestrial bacteria with a size of no more than 1 μm are able to withstand aerodynamic heating when entering the Earth’s atmosphere at speeds greater than both the second and third cosmic speeds.</p>","PeriodicalId":56319,"journal":{"name":"Cosmic Research","volume":"26 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cosmic Research","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1134/s001095252460029x","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
A mathematical model has been developed describing the motion in near–Earth space (NES) and aerodynamic heating upon entry into the atmosphere of spherical microparticles of carbon (graphite) with radii from 0.5 to 3 μm, modeling spores of terrestrial bacteria, as well as spores of hypothetical bacteria of extraterrestrial origin. The model is based on a joint numerical solution of the equations of motion in the NES of the specified model microbiological object (MBO) and the heat balance equation describing the change in the internal energy of the MBO. The calculated data obtained show that the maximum temperatures of aerodynamic heating of spores of terrestrial bacteria separating from the surfaces of large low-orbit objects of artificial origin are significantly lower than the maximum temperature of survival of spores of terrestrial bacteria during pulsed heating. In addition, the results of numerical experiments give grounds for the assumption that the spores of hypothetical extraterrestrial bacteria with a size of no more than 1 μm are able to withstand aerodynamic heating when entering the Earth’s atmosphere at speeds greater than both the second and third cosmic speeds.
期刊介绍：
Cosmic Research publishes scientific papers covering all subjects of space science and technology, including the following: ballistics, flight dynamics of the Earth’s artificial satellites and automatic interplanetary stations; problems of transatmospheric descent; design and structure of spacecraft and scientific research instrumentation; life support systems and radiation safety of manned spacecrafts; exploration of the Earth from Space; exploration of near space; exploration of the Sun, planets, secondary planets, and interplanetary medium; exploration of stars, nebulae, interstellar medium, galaxies, and quasars from spacecraft; and various astrophysical problems related to space exploration. A chronicle of scientific events and other notices concerning the main topics of the journal are also presented.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
