Jason Hartwig
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View article: 3d Effervescence Modeling of a Titan Submarine
3d Effervescence Modeling of a Titan Submarine Open
View article: Mechanisms of Carbon Dioxide Fouling Formation and Growth During Boiling of Liquid Nitrogen on Nano-Smooth Surfaces and its Effect on Heat Transfer
Mechanisms of Carbon Dioxide Fouling Formation and Growth During Boiling of Liquid Nitrogen on Nano-Smooth Surfaces and its Effect on Heat Transfer Open
View article: Implications of living evidence formats for coverage decisions in the German health care system
Implications of living evidence formats for coverage decisions in the German health care system Open
Decision-makers consult systematic reviews and clinical guidelines to make informed coverage decisions based on the current state of evidence. Outdated recommendations in rapidly evolving areas such as lung cancer treatment, are challengin…
View article: Demonstration of charge-hold-vent (CHV) and no-vent-fill (NVF) in a simulated propellent storage tank during tank-to-tank cryogen transfer in microgravity
Demonstration of charge-hold-vent (CHV) and no-vent-fill (NVF) in a simulated propellent storage tank during tank-to-tank cryogen transfer in microgravity Open
The space exploration from a low earth orbit to a high earth orbit, then to Moon, Mars, and possibly asteroids and moons of other planets is one of the biggest challenges for scientists and engineers for the new millennium. The enabling of…
View article: Modeling of cryogenic heated-tube flow boiling experiments of nitrogen and methane with Generalized Fluid System Simulation Program
Modeling of cryogenic heated-tube flow boiling experiments of nitrogen and methane with Generalized Fluid System Simulation Program Open
Accurate modeling of cryogenic boiling heat transfer is vital for the development of extended-duration space missions. Such missions may require the transfer of cryogenic propellants from in-space storage depots or the cooling of nuclear r…
View article: Validation of Universal Cryogenic Flow Boiling Correlations in Thermal Desktop for Liquid Helium
Validation of Universal Cryogenic Flow Boiling Correlations in Thermal Desktop for Liquid Helium Open
Understanding two-phase cryogenic propellant behavior is key to enabling technologies for future spaceflight missions. Developing accurate models of two-phase flow phenomena, particularly in the current work, flow boiling in the heating co…
View article: Flight-ready Electrical Capacitance Tomography SMARTTS tank for use with cryogenics
Flight-ready Electrical Capacitance Tomography SMARTTS tank for use with cryogenics Open
The Atout SMARTTS (SMART Tanks for Space) system allows the propellant mass distribution in a storage vessel to be measured accurately under several motion and gravity conditions and at any fill level. Based on Electrical Capacitance Tomog…
View article: Microgravity Demonstration of a Hybrid Screen Channel Liquid Acquisition Device for Transfer of Cryogenic Fluids
Microgravity Demonstration of a Hybrid Screen Channel Liquid Acquisition Device for Transfer of Cryogenic Fluids Open
View article: Numerical Design of a Flow Restrictor for Tanked Liquid Nitrogen Undergoing Reduced-Gravity Flights
Numerical Design of a Flow Restrictor for Tanked Liquid Nitrogen Undergoing Reduced-Gravity Flights Open
View article: Thermal Desktop Modeling of the 2016 Cryote-2 Tank Chilldown and Fill Testing
Thermal Desktop Modeling of the 2016 Cryote-2 Tank Chilldown and Fill Testing Open
View article: Experimental Investigations on the Flow Boiling and Heat Transfer Characteristics During Chilldown Process in a Closed-Loop Chilldown Test Section
Experimental Investigations on the Flow Boiling and Heat Transfer Characteristics During Chilldown Process in a Closed-Loop Chilldown Test Section Open
View article: Dear Editor I Have Uploaded a Manuscript Entitled “A Terrestrial Cryogenic Transfer Line Chilldown
Dear Editor I Have Uploaded a Manuscript Entitled “A Terrestrial Cryogenic Transfer Line Chilldown Open
View article: A Terrestrial Cryogenic Transfer Line Chilldown Experimental Study - Performance Enhancements and Process Optimization Ii. Chilldown Efficiency, Effects of Flow Direction and Tube Wall Thickness
A Terrestrial Cryogenic Transfer Line Chilldown Experimental Study - Performance Enhancements and Process Optimization Ii. Chilldown Efficiency, Effects of Flow Direction and Tube Wall Thickness Open
View article: Flight-Ready Electrical Capacitance Tomography Smartts Tank for Use with Cryogenics
Flight-Ready Electrical Capacitance Tomography Smartts Tank for Use with Cryogenics Open
View article: Warm Pressurant Gas Bubble Point Experiments for Coarse Mesh Screen Channel Liquid Acquisition Devices in Liquid Nitrogen
Warm Pressurant Gas Bubble Point Experiments for Coarse Mesh Screen Channel Liquid Acquisition Devices in Liquid Nitrogen Open
View article: Liquid Temperature Gradient Estimation for Screen Channel Liquid Acquisition Device Bubble Point Tests in Liquid Nitrogen
Liquid Temperature Gradient Estimation for Screen Channel Liquid Acquisition Device Bubble Point Tests in Liquid Nitrogen Open
View article: Nitrogen flow boiling and chilldown experiments in microgravity using pulse flow and low-thermally conductive coatings
Nitrogen flow boiling and chilldown experiments in microgravity using pulse flow and low-thermally conductive coatings Open
View article: Space Screen Channel Liquid Acquisition Device Experiments in Liquid Nitrogen for Coarse Meshes. I. Cold Pressurant Gas Bubble Point Tests
Space Screen Channel Liquid Acquisition Device Experiments in Liquid Nitrogen for Coarse Meshes. I. Cold Pressurant Gas Bubble Point Tests Open
View article: Space Screen Channel Liquid Acquisition Device Experiments in Liquid Nitrogen for Coarse Meshes. Ii. Investigation of Effects of Temperature Gradients During Bubble Point Tests
Space Screen Channel Liquid Acquisition Device Experiments in Liquid Nitrogen for Coarse Meshes. Ii. Investigation of Effects of Temperature Gradients During Bubble Point Tests Open
View article: An advance in transfer line chilldown heat transfer of cryogenic propellants in microgravity using microfilm coating for enabling deep space exploration
An advance in transfer line chilldown heat transfer of cryogenic propellants in microgravity using microfilm coating for enabling deep space exploration Open
The extension of human space exploration from a low earth orbit to a high earth orbit, then to Moon, Mars, and possibly asteroids is NASA’s biggest challenge for the new millennium. Integral to this mission is the effective, sufficient, an…
View article: Hopper Missions to Triton and Pluto using a Vehicle with In-Situ Refueling
Hopper Missions to Triton and Pluto using a Vehicle with In-Situ Refueling Open
Key Points:• Global surface mobility is the key to comprehensive exploration of the diverse surfaces of worlds such as Triton.We propose to do this with a rocket-powered "hopper" vehicle • The Triton Hopper is a NASA Innovative Advanced Co…
View article: Survey of Cryogenic Nitrogen Thermomechanical Property Data Relevant to Outer Solar System Bodies
Survey of Cryogenic Nitrogen Thermomechanical Property Data Relevant to Outer Solar System Bodies Open
The outer Solar System has many bodies of interest that have continued to captivate the planetary science community, recently Triton, a captured Kuiper belt object (KBO) of Neptune, and Pluto. Limited fly‐by observational data shows eviden…
View article: NASA Glenn Research Center Creek Road Cryogenic Complex: Testing between 2005–2019
NASA Glenn Research Center Creek Road Cryogenic Complex: Testing between 2005–2019 Open
Creek Road Cryogenic Complex (CRCC) is the principle cryogenic fluids technology test facility at the NASA Glenn Research Center. CRCC consists of the Small Multipurpose Research Facility (SMiRF), Cryogenic Component Lab-7 (CCL-7), a calor…
View article: Validation of Heat Transfer Correlations in Line Chill-down Tests of Cryogenic Fluid in SINDA/FLUINT
Validation of Heat Transfer Correlations in Line Chill-down Tests of Cryogenic Fluid in SINDA/FLUINT Open
Line Chill-down heat transfer was modelled using SINDA/FLUINT. Multiple chill-down tests were modelled using the heat transfer correlations that are available in SINDA/FLUINT, as well as incorporating heat transfer empiricisms developed by…
View article: Static Measurements on HTS Coils of Fully Superconducting AC Electric Machines for Aircraft Electric Propulsion System
Static Measurements on HTS Coils of Fully Superconducting AC Electric Machines for Aircraft Electric Propulsion System Open
The NASA Glenn Research Center (GRC) has been developing the high efficiency and high-power density superconducting (SC) electric machines in full support of electrified aircraft propulsion (EAP) systems for a future electric aircraft. A S…
View article: The effect of reduced gravity on cryogenic nitrogen boiling and pipe chilldown
The effect of reduced gravity on cryogenic nitrogen boiling and pipe chilldown Open
Manned deep space exploration will require cryogenic in-space propulsion. Yet, accurate prediction of cryogenic pipe flow boiling heat transfer is lacking, due to the absence of a cohesive reduced gravity data set covering the expected flo…