Water Droplet Evaporation in Air During Compression in a Gas Turbine Engine

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Abstract:

A water fog concept is being considered for evaporative cooling of the air as it is compressed in a ship gas turbine engine. The following analysis is presented to clarify the physics associated with liquid droplet evaporation in this situation, to understand the conditions affecting the cooling, and to identify any further information required to achieve such a concept. The vaporization of small liquid drops in a warm ideal gas is controlled by the outward motion of the vapor and the inward flow of heat to cause evaporation. Following the standard analysis of Spalding, as given in Principles of Combustion by Kuo, it is assumed that the process is quasi steady. This means that the conditions far removed from the drop are constant, and that there are no time varying terms in the Eulerian description of the mass and energy flows.

Author(s):
Quandt, Earl
Author Organization(s):
NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
Descriptive Note:
Technical memo.
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NSWCCD-TM-80-96/06
Monitor Series:
NSWCCD
 Subject Terms
Joint Capability Areas:
JCA_5.3_Planning; JCA_5_Command and Control; JCA_8.2_Shape; JCA_8_Building Partnerships; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_5.3.2_Apply Situational Understanding; JCA_4.1_Deployment and Distribution; JCA_1.2.6_Concepts; JCA_8.2.1_Partner with Governments and Institutions; JCA_8.2.2_Provide Aid to Foreign Partners and Institutions
Communities of Interest:
Materials and Manufacturing Processes
Descriptor(s):
*COMPRESSION, *AIR, *WATER, *GAS TURBINES, *DROPS, *EVAPORATION, *MARINE ENGINES, SHIPS, LIQUIDS, MOTION, ENERGY TRANSFER, COOLING, COMBUSTION, FOG, NAVAL RESEARCH, HOT GASES, FLOW, HEAT, VAPORIZATION
Field(s)/Group(s):
Physical Chemistry, Marine Engineering, Jet and Gas Turbine Engines
Keyword(s):
GAS TURBINE ENGINE
Report Date:
1996 Apr 01
Creation Date:
1998 Sep 30