随着中速柴油机的持续发展，对涡轮增压器的要求也在不断提高。涡轮增压器的设计师们面临着需要提高压比、提高效率和扩大使用重油的挑战。本文介绍了对涡轮增压器的要求和提供价廉、可靠涡轮增压器所需的设计特点。着重介绍了为满足这些要求的增压器系列中的一个最近产品──—纳皮尔（Napier）457型增压器。 With the continuous development of medium-speed diesel engines, the demand for turbochargers is also constantly increasing. Turbochargers face the challenge of increasing pressure ratios, increasing efficiency and expanding the use of heavy oil. This article describes the requirements for a turbocharger and the design features needed to provide a cost-effective and reliable turbocharger. A recent product in the turbocharger series to meet these requirements is highlighted - the Napier Model 457 supercharger.