초록 ▼

A combustion case for a gas turbine engine. A typical combustion case is generally cylindrical or conical. Apertures penetrate the case, from the outer surface, through the case, to the inner surface. The apertures act as concentration points for stress. To dissipate the stress, bosses buttress the

A combustion case for a gas turbine engine. A typical combustion case is generally cylindrical or conical. Apertures penetrate the case, from the outer surface, through the case, to the inner surface. The apertures act as concentration points for stress. To dissipate the stress, bosses buttress the apertures, with each aperture having two bosses: one on the outer surface of the case, and another on the inner surface of the case. The invention eliminates the latter bosses. The invention dissipates stress by providing an array of T-slots on the inner surface.

대표청구항 ▼

A combustion case for a gas turbine engine. A typical combustion case is generally cylindrical or conical. Apertures penetrate the case, from the outer surface, through the case, to the inner surface. The apertures act as concentration points for stress. To dissipate the stress, bosses buttress the

A combustion case for a gas turbine engine. A typical combustion case is generally cylindrical or conical. Apertures penetrate the case, from the outer surface, through the case, to the inner surface. The apertures act as concentration points for stress. To dissipate the stress, bosses buttress the apertures, with each aperture having two bosses: one on the outer surface of the case, and another on the inner surface of the case. The invention eliminates the latter bosses. The invention dissipates stress by providing an array of T-slots on the inner surface. ging pressure, calculating a second control signal based on an actual rotational speed of one of the compressor and the turbine, and calculating a third control signal for controlling the gear ratio between the output shaft and the compressor whereby the compressor achieves an intended rotational speed for generating a desired intake air flow as a function of the first control signal and the second control signal. 8. A control method for a supercompound-engine, said method comprising: generating a control signal to a variable transmission included in a supercompound-engine, wherein the control signal constitutes a function of a first control signal generated by means of a feed-back coupling of a condition variable in an intake air pipe arranged at the supercompound-engine, and a second control signal generated by means of a feed forward coupling of actual rotational speed of one of a turbine and a compressor arranged at the supercompound-engine.