Verification of the Effectiveness of Devices for the Protection of the Exterior Surface of ISS from Contaminants Deposited by Pulsed Cycling of Liquid-Jet (Kromka) - 09.17.14
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Science Objectives for Everyone
Kromka investigates the contamination of critical external surfaces (such as radiators, solar arrays, etc) caused by propulsion thrusters of the various vehicles flying to the ISS and is assessing the efficiency of various gas-dynamic protective devices to minimize thruster contamination.
Science Results for Everyone
Sponsoring Space Agency
Russian Federal Space Agency (Roscosmos)
ISS Expedition Duration
August 2001 - September 2006
Previous ISS Missions
Checkout of the efficiency of operation of gas-dynamic protective devices accommodated on the Service module and designed to protect the ISS surfaces against contaminants produced by pulse activation of control liquid-jet thrusters. Study of the effect of contaminants deposition on the characteristics of materials specimens and external coatings of the ISS elements (radiators, solar array panels, etc.).
Boards with materials specimens.
Installation of boards with materials specimens on the external surface of the Zvezda Service module (SM) of the ISS RS in the periphery area of the jet of the thrusters nozzles during extravehicular activity. Passive exposure of the boards on the SM external surface. Dismounting of the boards after long-duration exposure during extravehicular activity and their return to the ground for processing of the experiment results.
Gerasimov YI, Yarygin IV, Yarygin IV. Methodology of studying the parameters of contaminant emissions from the orientation engines of orbital stations during and after the flight. Russian Journal of Physical Chemistry B. 2008 October; 2(5): 787-794.
Gerasimov YI, Krylov AN, Sokolova SP, Prikhodko VG, Yarygin VN, Yarygin IV, Yarygin IV, Rebrov SG, Buryak AK. Gas Dynamics Aspects of Contamination of the International Space Station. 2. In-situ Experiments. Thermophysics and Aeromechanics (Teplofizika i Aeromekhanika) . 2003; 10(4): 555-565.
Gerasimov YI, Krylov AN. Results of Studying the Effect of Contamination from the Inherent External Atmosphere on the Characteristics of the Structural Materials and Temperature Control Coatings of ISS Vehicles and Modules. Physical/Chemical Kinetics in Gas Dynamics (Fiziko-Chimiceskaja Kinetika v Gazovoj Dinamike). 2011.
Gerasimov YI, Buryak AK. Conditions of formation of stable deposits of incomplete combustion products of liquid rocket fuels on the external elements of orbital stations. Russian Journal of Physical Chemistry B. 2008 October; 2(5): 779-786. DOI: 10.1134/S1990793108050205. [Original Russian Text © Yu.I. Gerasimov, A.K. Buryak, 2008, published in Khimicheskaya Fizika, 2008, Vol. 27, No. 10, pp. 26–34.]
Ground Based Results Publications
Rebrov SG. The Contamination Impact on Spacecraft of Control Liquid-propellant Low-thrust jets Using Nitrogen Tetroxide and UDMH Components. 3rd International Conference on Small Satellites, Korolev, Russia; 2002
Coordinating Scientific and Technical Council of the Russian Space Agency [Russian]
Energia - Science Research on the ISS Russian Segment
One of the specimen boards.
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