The Naval Academy Heat Balanced Engine (NAHBE).
Progress rept. Apr-Jun 76,
NAVAL ACADEMY ANNAPOLIS MD DIV OF ENGINEERING AND WEAPONS
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The heat balanced or combined cycle engine with time dependent combustion sustained by two chamber geometry is demonstrated experimentally. The theoretical basis and hardware for achieving the cycle are described. Evidence of time depedent heat addition is given where combustion creates pressure waves sustained by pressure exchange between two chambers. The basic cycle and operating characteristics are reviewed and experimental performance of CFR and glass-walled engines are compared to the OTTO engine. Open throttle and throttled engine results are given. Preliminary results on parametric variation of engine variables, compression ignition behavior are reported. Improvements in thermal efficiency over the OTTO engine in excess of 45 are demonstrated in some operating regimes. Considerable reduction in peak pressure and exhaust emission are also demonstrated. Author
- Reciprocating and Rotating Engines