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Wednesday, August 5, 2020 | History

3 edition of Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures found in the catalog.

Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures

Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures

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  • 25 Currently reading

Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Electric propulsion.,
  • Arc-jet rocket engines.

  • Edition Notes

    StatementTerry L. Hardy and Francis M. Curran.
    SeriesNASA technical memorandum -- 89876.
    ContributionsCurran, Francis M., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15284068M

    The reactor is where the electrolysis of water into hydrogen and oxygen gas occurs. It is a watertight and airtight container that holds the reactor core (wired to the power source), the water, and the created H 2 and O 2 gases, and feeds these gases to your hydrogen science project.. The amount of HHO gas generated depends on the size of the reactor (specifically, the core) and the amount of. Low power arcjets perform well at to kW. Below kW Each step corresponds to a distinct chemical reaction. For the ammonia oxidation step, a ammonia/air mixture is oxidized at a temperature of –°C (–°F) as it passes through a catalytic converter: The final step introduces this mixture of nitrogen.

    DAGen™ Ammonia Dissociation Generator The DAGen™ is the most advanced dissociated ammonia generator on the market. The DAGen™ combines our proprietary ReactionCore™ with electronic flow measurement and a complete sensor array to provide the most efficient and highest quality ammonia dissociation for your nitrogen hydrogen atmosphere applications. The DME arcjet thruster yielded both high and low voltage modes. The thruster showed high voltage mode at mass flow rates above 30 mg/s and lowvoltage mode below 30 mg/s. Thrust using DME propellant increased steadily with mass flow rate, and was higher than that using nitrogen. maximum thrust of N, specific impulse of s, and discharge.

    In aerospace applications, arcjet thrusters were developed for near-earth missi ons. A low power arcjet thruster is a commercial one with ammonia, and mixture of hydrogen and nitrogen, hydrazine decomposed gases, as propellants. The arcjet generator is also available as arc heaters for entry and reentry simulations into atmospheric. In aerospace applications, arcjet thrusters were developed for near-earth missions. A low power arcjet thruster is a commercial one with ammonia, and mixture of hydrogen and nitrogen, hydrazine decomposed gases, as propellants. The arcjet generator is also available as arc heaters for entry and reentry simulations into atmospheric.


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Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures Download PDF EPUB FB2

Low power DC arcjet operation with hydrogen/nitrogen/ammonia mixtures The effect of gas composition and ambient pressure on arcjet operation was determined.

Arcjet operation in different facilities was also compared to determine the validity of tests in small facilities. Volt-ampere characteristics were determined for an arcjet using hydrogen.

Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures [microform] / Terry L. Hardy and Francis M. Curran National Aeronautics and Space Administration ; For sale by the National Technical Information Service [Washington, DC: Springfield, Va Australian/Harvard Citation.

Hardy, Terry L. & Curran, Francis M. & United States. Buy Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures (SuDoc NAS ) by Hardy, Terry L. (ISBN:) from Amazon's Book Store.

Everyday low prices and free delivery on eligible : Terry L. Hardy. Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures. Chemical Nonequilibrium Modeling of Low-Power Nitrogen/Hydrogen Arcjet Thrusters.

28 June | Journal of Propulsion and Power, Vol. 32, No. Recommended. dc arcjet plasma characteristics using ammonia and mixture of nitrogen and hydrogen. Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures.

hydrogen/nitrogen/ammonia mixtures, and pure ammonia as propellants at various flow rates. The arcjet had a typical performance of sec specific impulse at 1 kW with hydrogen/nitrogen mixtures. It was determined that the amount of ammonia present in the gas stream Author: Francis M.

Curran and Terry L. Hardy. The arcjet assembly from a flight model system was modified with a new thoriated tungsten nozzle insert and has been tested with hydrogen-nitrogen mixtures simulating the decomposition products of ammonia and hygrazine. Arcjet power consumption ranged from to kW depending on low rate, input current, and mixture : S.

Nakanishi and F. Curran. The arcjet had a typical performance of sec specific impulse at 1 kW with hydrogen/nitrogen mixtures. It was determined that the amount of ammonia present in the gas stream had a significant effect on the arcjet volt-ampere characteristics.

Also, hydrogen/nitrogen mixtures simulating ammonia gave arc characteristics approximately the same. dc arcjet plasma characteristics using ammonia and mixture of nitrogen and hydrogen. Hirokazu Tahara, ; Tomoki Taniguchi, ; Ken-ichi Onoe and ; Takao Yoshikawa.

Low power arcjet operation on hydrogen/nitrogen /ammonia mixtures was reported previously. The arcjet had a typical performance of s specific impulse at 1 kW with hydrogen/nitrogen mixtures[1,2] as the propel-lant. It was found that the amount of ammonia present in the gaseous propellant had significant effect on the arcjet voltage-ampere.

A modeling study is conducted to investigate the effect of hydrogen content in propellants on the plasma flow, heat transfer and energy conversion characteristics of low-power (kW class) arc-heated hydrogen/nitrogen thrusters (arcjets).

(pure hydrogen), (to simulate decomposed ammonia), (to simulate decomposed hydrazine) and (pure nitrogen) hydrogen/nitrogen mixtures. Exhaust velocities of about km/s are reached with liquid fuels like Hydrazine or Ammonia.

Status: Terry L.; Curran, Francis M. "Low Power DC Arcjet Operation with Hydrogen/Nitrogen/Ammoinia Mixtures", NASA Technical MemorandumHydrogen can be mixed with the plasma.

This increases thrust at the expense of performance. Departures from thermal, chemical equilibrium of a plasma flow in a low-power arcjet thruster with a nitrogen/hydrogen mixture as the working gas have been studied by axisymmetric numerical.

Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures (SuDoc NAS ) [Terry L. Hardy] on *FREE* shipping on qualifying : Terry L. Hardy. Get this from a library.

Low power dc arcjet operation with hydrogen/nitrogen/ammonia mixtures. [Terry L Hardy; Francis M Curran; United States. National Aeronautics and Space Administration.]. Reliability studies of Integrated modular engine system designs [microform] / Terry L. Hardy and Douglas C.

Rapp National Aeronautics and Space Administration ; National Technical Information Service, distributor [Washington, DC: Springfield, Va Australian/Harvard Citation. Hardy, Terry L. & Rapp, Douglas C. & United States. The performance of water-cooled and radiation-cooled arcjet thrusters operating on both nitrogen/hydrogen mixtures at kW and on pure hydrogen at kW are compared.

Free ammonia is a gas and toxic, and ammonium is in ionized form, which is non-toxic salt. NH 3 or free ammonia nitrogen (FAN) and NH 4 together make total ammonia nitrogen (TAN). FAN takes part in the inhibitory actions in the AD process since the high concentration of free ammonia in the system ruptures the cell wall of the microbes, leading.

Get this from a library. Low power dc arcjet operation with hydrogen/nitrogen propellant mixtures. [Francis M Curran; Shigeo Nakanishi; United States. National Aeronautics and Space Administration.]. be set at 10% of the LEL of hydrogen ( mol%, mol% and mol% for hydrogen in nitrogen, hydrogen in argon and hydrogen in helium respectively).

Other considerations when using hydrogen gas mixtures or pure hydrogen: To minimize the potential for leaks, tubing and piping should be stainless steel with a minimum number of fittings. Ammonia (NH3) bonds together 1 nitrogen atom but 3 hydrogen atoms. "Amazingly enough, there's a greater mass of hydrogen in a liter of liquid ammonia than there is in a liter of liquid hydrogen.

8 OPTIONS FOR PRODUCING LOW-CARBON HYDROGEN AT SCALE CHAPTER ONE Ammonia – a resource of growing interest Over 50% of the current worldwide production of hydrogen is used in the synthesis of ammonia, which, in turn, is principally used to make fertilisers.

Hydrogen from steam methane reforming is reacted with nitrogen to form ammonia using.A low power, dc arcjet thruster was tested for starting reliability using hydrogen-nitrogen mixtures simulating the decomposition products of hydrazine.

More than starts were accumulated in phases with extended burn-in periods interlaced. A high degree of flow stabilization was built into the.The U.S.

Department of Energy's Office of Scientific and Technical Information.