A reaction mechanism of n-heptane is coupled with a reduced NO x mechanism to simulate diesel fuel oxidation and NO x formation. Journal of Verification, Validation and Uncertainty QuantificationĪ detailed chemistry-based CFD model was developed to simulate the diesel spray combustion and emission process.Journal of Thermal Science and Engineering Applications.Journal of Offshore Mechanics and Arctic Engineering.Journal of Nuclear Engineering and Radiation Science.Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems.Journal of Nanotechnology in Engineering and Medicine.
Mechanical Engineering Magazine Select Articles.While it would be better if their replacements arrived first-in order to share tips on living in space-Kimbrough said the remaining NASA astronaut will fill in the newcomers. One American and two Russians will remain on the space station following their departure. Their capsule is certified for a maximum 210 days in space, and with Friday marking their 196th day aloft, NASA is eager to get them back as soon as possible. SpaceX launched them to the space station on April 23. "Some found that more troublesome than others."Īlso returning with McArthur and Pesquet: NASA astronaut Shane Kimbrough and Japanese astronaut Akihiko Hoshide. "They have a nice spiciness to them, a little bit of a lingering burn," she said. They got to sample their harvest in the past week, adding pieces of the green and red peppers to tacos. On the culinary side, the astronauts grew the first chile peppers in space-"a nice moral boost," according to McArthur. The astronauts will have to rely on what NASA describes as absorbent "undergarments." SpaceX fixed the toilet on the capsule awaiting liftoff, but deemed the one in orbit unusable.Įngineers determined that the capsule had not been structurally compromised by the urine and was safe for the ride back. The problem was first noted during SpaceX's private flight in September, when a tube came unglued and spilled urine beneath the floorboards. They also had to deal with the toilet leak, pulling up panels in their SpaceX capsule and discovering pools of urine.
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The astronauts conducted a series of spacewalks to upgrade the station's power grid, endured inadvertent thruster firings by docked Russian vehicles that sent the station into brief spins, and hosted a private Russian film crew-a space station first. SpaceX is now targeting liftoff for Wednesday night at the earliest.įrench astronaut Thomas Pesquet, who will return with McArthur, told reporters that the past six months have been intense up there. That SpaceX launch already had been delayed more than a week by bad weather and an undisclosed medical issue involving one of the crew. So we're not too worried about it."Īfter a series of meetings Friday, mission managers decided to bring McArthur and the rest of her crew home before launching their replacements. "This is just one more that we'll encounter and take care of in our mission.
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"Spaceflight is full of lots of little challenges," she said during a news conference from orbit. She and her three crewmates will spend 20 hours in their SpaceX capsule, from the time the hatches are closed until Monday morning's planned splashdown. NASA astronaut Megan McArthur described the situation Friday as "suboptimal" but manageable.
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