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contributor authorAnderson, K. R.
contributor authorClark, A.
contributor authorForgette, D.
contributor authorDevost, M.
contributor authorOkerson, R.
contributor authorWells, T.
contributor authorCunningham, S.
contributor authorStuart, M.
date accessioned2017-05-09T01:07:29Z
date available2017-05-09T01:07:29Z
date issued2014
identifier issn1528-8919
identifier othergtp_136_04_041508.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/154679
description abstractCurrent trends in engine design have pushed the state of the art regarding high powertoweight ratio gasoline engines. Newly developed engine systems have a powertoweight ratio near 1 hp per pound. The engine configuration presented herein makes it possible to package a large number of power producing pistons in a small volume, resulting in a powertoweight ratio near 2 hp per pound, which has never before been realized in a production engine. The analysis and design of a lightweight twostroke 6sided inplane polygon engine having a geometric compression ratio of 15.0, an actual compression ratio of 8.8, and a piston speed of 3500 ft/min are presented in this investigation. Typical results show that for a hexagonal engine with 2 in. diameter pistons and 1.25 in. stroke, a single piston displacement is 7.85 cubic in., while the total engine displacement is 47. 1 cubic in. Full power at 12,960 rpm at an air flow rate of 353 cubic feet per minute affords 0.444 cubic ft/min/hp for specific power. For an efficiency of 21%, the blower power is 168 hp. Our airflow analysis shows that the power of the engine does not depend on the number of pistons, but rather on the volume of the gasair mixture which passes through the engine. System level engineering of power output, kinematic modeling, airflow modeling, efficiency, scavenging predictions, crankshaft sizing, and weight estimates are presented.
publisherThe American Society of Mechanical Engineers (ASME)
titleAnalysis and Design of a Lightweight High Specific Power Two Stroke Polygon Engine
typeJournal Paper
journal volume136
journal issue4
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.4026049
journal fristpage41508
journal lastpage41508
identifier eissn0742-4795
treeJournal of Engineering for Gas Turbines and Power:;2014:;volume( 136 ):;issue: 004
contenttypeFulltext


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