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Mathematical Model of Heat-Controlled Accumulator (HCA) for Microgravity Conditions

National Aerospace University Kharkov Aviation Institute, Ukraine-Gennadiy Olexandrovich Gorbenko, Polina Sergeevna Koval, Konstantin Sergeevich Yepifanov, Pavlo Grigorovich Gakal, Rustem Yusufovich Turna
  • Journal Article
  • 01-13-01-0001
Published 2020-01-09 by SAE International in United States
It is reasonable to use a two-phase heat transfer loop (TPL) in a thermal control system (TCS) of spacecraft with large heat dissipation. One of the key elements of TPL is a heat-controlled accumulator (HCA). The HCA represents a volume which is filled with vapor and liquid of a single working fluid without bellows. The pressure in a HCA is controlled by the heater. The heat and mass transfer processes in the HCA can proceed with a significant nonequilibrium. This has implications on the regulation of TPL. This article presents a mathematical model of nonequilibrium heat and mass transfer processes in an HCA for microgravity conditions. The model uses the equations of mass and energy conservation separately for the vapor and liquid phases. Interfacial heat and mass transfer is also taken into account. It proposes to use the convective component k for the level of nonequilibrium evaluation. The experiments were carried out in microgravity conditions for the estimation of the k value. The heating of the HCA was investigated in the flight experiments. The working…
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In-Situ Resource Utilization (ISRU): Methylotrophic Microorganisms Expressing Soluble Methane Monooxygenase Proteins

  • Magazine Article
  • TBMG-35812
Published 2020-01-01 by Tech Briefs Media Group in United States

Long-duration missions to planetary bodies and deep space will require new technological developments that support human habitation in transit and on distant bodies. Microorganisms are unique from the standpoint that they can be employed as self-replicating bio-factories to produce both native and engineered mission-relevant bio-products. Methane (CH4) usage in In-Space Manufacturing (ISM) platforms has been discussed previously for human exploration and has been proposed to be used in physicochemical systems as a propulsion fuel, supply gas, and in fuel cells.

MMOD Impact Detection and Location

  • Magazine Article
  • TBMG-35686
Published 2019-12-01 by Tech Briefs Media Group in United States

Determination of micrometeoroid/ orbital debris (MMOD) impact on orbiting spacecraft currently requires visual inspection. For human-rated spacecraft such as the International Space Station (ISS) and previously, the Space Shuttle Orbiter, this has required crew time as well as vehicle assets to identify damage due to MMOD strikes. For unmanned spacecraft, there are no human assets present to conduct detailed surveys to ascertain potential damage.

How Augmented Reality Can Modernize Aerospace And Defense Manufacturing

  • Magazine Article
  • TBMG-35685
Published 2019-12-01 by Tech Briefs Media Group in United States

You've probably heard about augmented reality (AR) in the context of consumer entertainment: video gaming, virtual tours, or interactive displays. But AR for enterprise business is here. It's no longer an emerging technology, or a novelty; businesses are using AR to overhaul processes, drive efficiencies, reduce manufacturing errors, and improve their bottom line.

Docking System Enables Safe Rendezvous in Space

  • Magazine Article
  • TBMG-35614
Published 2019-12-01 by Tech Briefs Media Group in United States

Even though it has been done many times before, the docking maneuver between two objects in space is always a delicate and potentially dangerous procedure. The speed is extremely high (about 28,000 km/h in the case of the International Space Station, or ISS), and corrections are difficult. When the two objects are about to meet, maneuvering thrusters can no longer be used since their exhaust plumes can cause damage. To prevent harm, cargo transporters are caught by a robotic arm installed in the ISS and berthed manually. Manned spacecraft, on the other hand, dock directly in a computer-controlled process.

A Vision-Based Lunar Navigator for Next-Generation Landers

  • Magazine Article
  • TBMG-35471
Published 2019-11-01 by Tech Briefs Media Group in United States

In July of 2015, NASA published NASA Technology Roadmaps — TA9: Entry, Descent, and Landing Systems (EDL). In it, they laid out their EDL goals for the coming years: To develop new and innovative technology, not just for the moon, but also for future exploration throughout our solar system. Toward achieving these goals, NASA awarded a contract to the Charles Stark Draper Laboratory, or Draper for short, to develop and test their multi-environment navigator (DMEN), which uses vision-based navigation techniques, as a means to guide small craft to land on the moon.

Software Applications for the Control and Management of the Amine Swingbed Experiment

  • Magazine Article
  • TBMG-35265
Published 2019-10-01 by Tech Briefs Media Group in United States

The Swingbed software applications provide for the control, command, fault detection, fault recovery, and telemetry monitoring aspects of the Amine Swingbed experiment. These software components are the Swingbed Loader Computer Software Configuration Item (CSCI), the Swingbed Control Module, and the Swingbed Ground Controller applications. As a whole, the Amine Swingbed experiment provides a means for investigating the removal of carbon dioxide from the International Space Station (ISS) crews’ breathing environment via a system of a vacuum-regenerated amine pressure swing absorption reaction beds. Its development and deployment aboard the ISS as an Express Rack pay-load serves to advance the use of the amine-based pressure swing absorption technology towards a level of technology readiness suitable for use in future space transportation systems, where the use of consumables for the removal of carbon dioxide from the breathable environment is not desirable.

Structure Deformation Calculation Program for Structural Shape Monitoring

  • Magazine Article
  • TBMG-35289
Published 2019-10-01 by Tech Briefs Media Group in United States

Researchers at NASA’s Armstrong Flight Research Center are pioneering shape-sensing technologies that seek to maximize structural integrity and efficiency. A new and versatile computer program offers critical shape-monitoring capabilities and has applications for a wide variety of structures.

Understanding Fiber Optic Transceiver Design and Test Rules

  • Magazine Article
  • TBMG-35119
Published 2019-09-01 by Tech Briefs Media Group in United States

The design of avionics systems must balance several factors. First, engineers want to increase the performance of the systems installed in aircraft or spacecraft. Second, they want to reduce the size and weight of the equipment that must be carried. Third, they want to maximize the safety of the in-flight systems and maintain communication between the aircraft or spacecraft and other flight vessels and the command center, regardless of the circumstances.

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Understanding Fiber Optic Transceiver Design and Test Rules

Aerospace & Defense Technology: September 2019

  • Magazine Article
  • 19AERP09_03
Published 2019-09-01 by SAE International in United States

The design of avionics systems must balance several factors. First, engineers want to increase the performance of the systems installed in aircraft or spacecraft. Second, they want to reduce the size and weight of the equipment that must be carried. Third, they want to maximize the safety of the in-flight systems and maintain communication between the aircraft or spacecraft and other flight vessels and the command center, regardless of the circumstances.

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