At present, turbochargers have been widely used in the automotive field. Although each manufacturer has its own characteristics in product development, and the characteristics of development vary according to their uses, the characteristics of high efficiency, miniaturization and large capacity are consistent. Especially for truck, industrial and marine turbochargers, high-pressure ratio turbochargers have been one of the development trends recently. As a product for automobiles, there is still a strong demand for improvement in its low-speed performance and acceleration follow-up. Realize the miniaturization and large capacity of the turbine.
Due to the increase in diesel engine power and the improvement in the requirements for installation convenience, while achieving high efficiency of turbines and compressors, the requirements for miniaturization and large capacity have also increased. In addition, improving the acceleration performance of automotive turbochargers has also become an important issue. The reduction in turbine diameter has a great effect on reducing the moment of inertia of the rotor.
For this reason, according to the requirements of miniaturization and large capacity, a high-speed radial turbine was developed, which reduced the inlet diameter and increased the outlet diameter to increase the flow rate. This high specific speed turbine is used in automotive turbochargers. It is smaller than traditional turbines and weighs more than 20% less.
Recently, not only high specific speed radial turbines have been developed, but also mixed flow turbines. In this way, the flow rate of mixed flow turbines is about 14% higher than that of high specific speed leakage turbines, and the efficiency is also improved by several percentage points. This achievement has been applied to marine diesel engine radial turbines and truck turbines.
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Post time: Sep-25-2024