Kinetics and Energy Transfer in Nonequilibrium Fluid Flows

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Abstract:

Chemical kinetics and energy transfer have been investigated for nonequilibrium fluid flow. The particular process of interest is ultraviolet emission from the A2 sigma excited electronic state of NO, which is generated under nonequilibrium conditions in the bow shock waves of ascending missiles at 50 to 100 km altitude. A literature survey of the pertinent rate constants and mechanism for use in computer models of the process has been undertaken. Emission from NO has been studied in shock tubes, using shock heated air and other gas mixtures. Collisional quenching of the A2 sigma state is the reverse of heavy particle excitation of the emission. Its temperature dependence has been studied in a heated cell and a shock tube. An attempt was made to determine the final vibrational state distribution in the ground electronic state, concluding that the NO is transferred into high vibrational levels.

Author(s):
Crosley, David R.
Author Organization(s):
SRI INTERNATIONAL MENLO PARK CA MOLECULAR PHYSICS CENTER
Descriptive Note:
Final rept. 17 Jun 90-16 Sep 92,
Pagination:
0069

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-27864.3-EG-SDI
Contract/Grant Number(s):
DAAL03-90-K-0001
Monitor Series:
27864.3-EG-SDI, ARO
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2.7_Experimentation; JCA_5.3.2_Apply Situational Understanding; JCA_5.3.3_Develop Strategy; JCA_5.3.4_Develop Courses of Action; JCA_5.3.5_Analyze Courses of Action; JCA_1.3.2_Personnel Management; JCA_5.2.2_Develop Knowledge and Situational Awareness; JCA_5.2_Understand; JCA_1.2.5_Lessons Learned; JCA_4.5.4_Requirements Definition; JCA_4.5_Operational Contract Support
Modernization Areas:
Hypersonics; Quantum Science and Computing; Fully Networked C3
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*ENERGY TRANSFER, *NONEQUILIBRIUM FLOW, *FLUID FLOW, HEAT TRANSFER, REENTRY VEHICLES, TEMPERATURE, SPACECRAFT, ULTRAVIOLET RADIATION, PARTICLES, FLUIDS, ROCKET EXHAUST, SHOCK TUBES, BOW SHOCK, KINETICS, ELECTRONIC STATES, QUENCHING, CHEMICALS, AERODYNAMIC STABILITY, EXCITATION, SHOCK WAVES
Field(s)/Group(s):
Aerodynamics, Fluid Mechanics
Report Date:
1993 Feb 03