Accession Number:

AD1112994

Title:

Heavy-Duty Diesel Piston Thermal Analysis: High-Temperature Alloys

Descriptive Note:

[Technical Report, Briefing Charts]

Corporate Author:

US Army Combat Capabilities Development Command, Ground Vehicle Systems Center

Personal Author(s):

• Byrd, Gerald
• Tess, Michael
• Gingrich, Eric
• Korivi, Vamshi

Report Date:

2020-10-15

Pagination or Media Count:

15

Abstract:

Objective Support a research program investigating the use of commercial and developmental high-temperature alloys in a heavy-duty diesel piston application. Methods Perform a Steady-State Thermal-Stress Analysis to predict the piston temperature profile1. Given experimental measurements of piston surface heat flux p.3 and subsurface temperature p.4 for microalloyed steel MAS piston, calibrate the under-crown heat transfer coefficients p.5 in the model. 2. Given experimental surface heat flux and calibrated heat transfer coefficients from previous step, model the piston temperature profiles p.7 when changing to conductivity of high-temperature commercial alloys A286 UNS S66286, 422 S42200, DH31-EX Daido Steel, and H10 T20810. Perform a fatigue analysis not shown in this presentation.

Descriptors:

• heat transfer
• heat transfer coefficients
• heat flux
• high temperature
• engines
• flow rate
• thermal conductivity
• coefficients
• conductivity
• diesel engines
• heat energy
• heat resistant alloys
• heavy duty
• measurement
• experimental data
• pistons
• steady state
• stress analysis
• structural analysis
• surface temperature

Subject Categories:

• Reciprocating and Rotating Engines
• Thermodynamics
• Properties of Metals and Alloys

Distribution Statement:

[A, Approved For Public Release]