Open-loop thermal cycle turbine engine system is very fit for modern high speed autonomous under water vehicle(AUV) because of its good operation performance and simple system structure, but this power system can t keep its stability when it works in the condition of ultrahigh drain pressure and low speed, such a behavior makes the design of control system difficult.

Volume efficiency,internal leakage and exhaust pressure will cause temperature rise of Roots blowers.

In order to find the relationship between punching rate and exhaust pressure,we used Fluent software to simulate the inner flow field of mufflers with different punching rate.

Using relationship between the change of the instant exhaust pressure of the engine and speed, the frequency signal of the engine exhaust was collected and transited into electrical signal, which was delivered to signal processor and converted into digital pulse signal, then transferred to the center processor.

Fabrication of aluminum matrix composites with high volume fraction using the squeeze exhaust casting process;

The serial control of the compressors discharge pressure;

Analysis of influence of discharge pressure on the uncertainty measurement of reciprocating refrigeration compressor;

For a split type air source heat pump, compares and analyses variation of the parameters such as compressor shaft power, suction and discharge pressures under normal defrosting and false defrosting conditions.