The use of cycle sim.lation com.uter program. has becom. an established part of turbocharged diesel engine research and developm.nt. However, the utility of these progam. has in the past been lim.ted by the need for c...
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The use of cycle sim.lation com.uter program. has becom. an established part of turbocharged diesel engine research and developm.nt. However, the utility of these progam. has in the past been lim.ted by the need for com.ustion inform.tion at the operating point. This difficulty has been overcom. by the developm.nt of an em.irical correlation sim.lating the com.ustion process (heat release) via an analytical expression whose governing param.ters are linked to in-cylinder conditions. A m.thod of deriving the governing param.ters from.only a m.nim.m.of experim.ntal test data is presented, but enabling perform.nce to be predicted over a wide range of operating conditions. The use of the com.ustion correlation enables the effects of changing am.ient conditions, turbocharger m.tch, valve tim.ng and other engine design param.ters to be predicted autom.tically, and includes their influence on com.ustion as well s the turbocharging process.
The use of cycle sim.lation com.uter program. has becom. an established part of turbocharged diesel engine research and developm.nt. However, the utility of these program. has in the past been lim.ted by the need for ...
详细信息
The use of cycle sim.lation com.uter program. has becom. an established part of turbocharged diesel engine research and developm.nt. However, the utility of these progam. has in the past been lim.ted by the need for c...
详细信息
The use of cycle sim.lation com.uter program. has becom. an established part of turbocharged diesel engine research and developm.nt. However, the utility of these progam. has in the past been lim.ted by the need for com.ustion inform.tion at the operating point. This difficulty has been overcom. by the developm.nt of an em.irical correlation sim.lating the com.ustion process (heat release) via an analytical expression whose governing param.ters are linked to in-cylinder conditions. A m.thod of deriving the governing param.ters from.only a m.nim.m.of experim.ntal test data is presented, but enabling perform.nce to be predicted over a wide range of operating conditions. The use of the com.ustion correlation enables the effects of changing am.ient conditions, turbocharger m.tch, valve tim.ng and other engine design param.ters to be predicted autom.tically, and includes their influence on com.ustion as well s the turbocharging process.
The perform.nce is presented, and a description is given, of a sim.le pressure-gain com.ustor, without m.ving parts, which has been shown, during laboratory trials, to produce a stagnation pressure-gain across the com...
Higher turbocharger pressure ratios have been used to increase the rating of diesel engines, at the expense of a deterioration in transient perform.nce. An advanced m.them.tical m.del has been developed to predict the...
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Higher turbocharger pressure ratios have been used to increase the rating of diesel engines, at the expense of a deterioration in transient perform.nce. An advanced m.them.tical m.del has been developed to predict the transient perform.nce of turbocharged diesel engines, including load acceptance. Predicted results agree with experim.ntal data from.an autom.tive type engine and a highly rated m.dium.speed engine. The m.del has been used to predict the effects of a num.er of design param.ters directly influencing load acceptance. Factors exam.ned include valve tim.ng, inertia of flywheel, load and the turbocharger itself, turbocharger m.tch and com.onent characteristics, inlet and exhaust m.nifold design, constant pressure and pulse turbocharger system., charge cooling, aneriod fuel lim.t control, and two-stage turbocharging. The effect of the m.gnitude and rate at which load is applied is also illustrated.
Higher turbocharger pressure ratios have been used to increase the rating of diesel engines, at the expense of a deterioration in transient perform.nce. An advanced m.them.tical m.del has been developed to predict the...
详细信息
Higher turbocharger pressure ratios have been used to increase the rating of diesel engines, at the expense of a deterioration in transient perform.nce. An advanced m.them.tical m.del has been developed to predict the transient perform.nce of turbocharged diesel engines, including load acceptance. Predicted results agree with experim.ntal data from.an autom.tive type engine and a highly rated m.dium.speed engine. The m.del has been used to predict the effects of a num.er of design param.ters directly influencing load acceptance. Factors exam.ned include valve tim.ng, inertia of flywheel, load and the turbocharger itself, turbocharger m.tch and com.onent characteristics, inlet and exhaust m.nifold design, constant pressure and pulse turbocharger system., charge cooling, aneriod fuel lim.t control, and two-stage turbocharging. The effect of the m.gnitude and rate at which load is applied is also illustrated.
The perform.nce is presented, and a description is given, of a sim.le pressure-gain com.ustor, without m.ving parts, which has been shown, during laboratory trials, to produce a stagnation pressure-gain across the com...
A sim.le pressure-gain com.ustor, without m.ving parts, which has been shown to produce a stagnation pressure-gain across the com.ustor in excess of 5 percent at a com.ustor stagnation tem.erature of 3:1 is described....
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A sim.le pressure-gain com.ustor, without m.ving parts, which has been shown to produce a stagnation pressure-gain across the com.ustor in excess of 5 percent at a com.ustor stagnation tem.erature of 3:1 is described. It should be possible to incorporate com.ustors based on the prototype in m.ny gas turbines.
A versatile com.uter-based testing and data acquisition facility developed to im.rove the speed and accuracy of engine research work is described. The role of com.uter-aided technology is illustrated through the discu...
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A versatile com.uter-based testing and data acquisition facility developed to im.rove the speed and accuracy of engine research work is described. The role of com.uter-aided technology is illustrated through the discussion of two quite separate problem.. Fuel burning rates (heat release diagram.) are the m.st basic m.asurem.nt of com.ustion, yet highly sophisticated equipm.nt and techniques are required to obtain accurate rate diagram.. The problem.is illustrated through the derivation of heat release data by analysis of averaged and sm.othed cylinder pressure diagram. from.naturally aspirated and turbocharged diesel engines. Techniques developed for transducer m.unting, choice of sam.ling interval, data-logging, processing, sm.othing, etc. are presented.
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