Quasi Equilibrium Fuel-Air Heat Balanced Cycle Analysis.
Abstract
The quasi equilibrium thermodynamic model of the Naval Academy Heat Balanced Engine (NAHBE) has been modified to include the influence of fuel-air chemistry on predicted indicated engine performance. Heat addition to the Air Standard Heat Balanced Cycle was expressed in terms of an appropriate fuel-air ratio and heating value for a standard fuel. Indicated parameters including mean effective pressure, peak pressure, specific fuel consumption and thermal efficiency for compatible Otto and Heat Balanced cycles were calculated and compared. Performance parameters for both cycles were obtained at equal compression ratios, fuel-air ratios, fuel type, and engine rpm. Results show that for overall stoichiometric heat addition the Heat Balanced cycle can produce greater indicated engine power, higher indicated thermal efficiency and lower indicated specific fuel consumption than the corresponding Otto cycle. Further analysis indicates that the optimum heat balancing conditions occur for constant volume heat addition with rich mixture composition followed by constant pressure heat addition with lean composition. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1979
- Accession Number
- ADA107767
Entities
People
- Andrew A. Pouring
- Eugene L. Keating