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Kinetic Molecular Dynamic Model of Hall Thruster Channel Wall Erosion

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
90610
Program Year/Program:
2009 / SBIR
Agency Tracking Number:
085530
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Tech-X Corporation
5621 Arapahoe Ave, Suite A Boulder, CO -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2009
Title: Kinetic Molecular Dynamic Model of Hall Thruster Channel Wall Erosion
Agency: NASA
Contract: NNX09CD11P
Award Amount: $99,818.00
 

Abstract:

Hall thrusters are being considered for many space missions because their high specific impulse delivers a larger payload mass fraction than chemical rockets. With a low thrust, however, Hall thrusters need to operate for a long period of time to achieve the necessary of the mission. For these missions, the lifetime requirements can reach into tens of thousands of hours. For Hall thrusters, the most important life-limiting process is the erosion of the channel walls. However, experimental verification of lifetime is time-consuming and expensive. Therefore, computational method is a useful tool to predict thruster lifetime. Many of the Hall thruster lifetime models were developed, and some of theses models gave quite promising results. However, while qualitatively interesting, the results did not match well with experiment. The reason of this discrepancy is that these numerical models assume electrons as a fluid. The proposed innovation will provide a better understanding of the erosion physics and will be useful for future thruster development with low cost and time. This tool also will allow to aid in the acceptance and implementation of Hall thrusters as a primary propulsion device through improving confidence of their long term reliability.

Principal Investigator:

Yongjun Choi
Principal Investigator
3039967522
yjchoi@txcorp.com

Business Contact:

Leslie W Rosczyk
Business Official
7209741855
lwr@txcorp.com
Small Business Information at Submission:

Tech-X Corporation
5621 Arapahoe Avenue, Suite A Boulder, CO 80303

EIN/Tax ID: 841256533
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No