propulsive efficiency


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propulsive efficiency

propulsive efficiency
Propulsive efficiency of various types of jet engines.
The ratio of propulsive power to the rate of increase of kinetic energy by the gas stream. In reciprocating engines, it is the ratio of the thrust horsepower produced by the propeller to the torque horsepower of the shaft turning the propeller.
References in periodicals archive ?
The water jet propulsion system is widely used primarily for high-speed vessels, because based on studies that have been conducted, it was showed that the water jet propulsion system has a feature that has nothing to do with its propulsive efficiency. Some of the features that the water jet propulsion system possesses are described below:
The development of a third stream provides an extra source of air flow to improve propulsive efficiency and lower fuel burn, or to deliver additional air flow through the core for higher thrust and cooling air.
Considering the relationship between the performance in swimming and the kinematic variables (FBr, DBr, VN and IB), significant correlations found in this study were with the FBR and is an important component of NV and one of the indicators of the propulsive efficiency. A significant correlation between FBr and the VN was observed in the search results.
This increases propulsive efficiency because of a larger total fan area while maintaining a moderate increase in fan diameter and weight.
MT-FAST is a fuel-saving device fitted to the submerged part of a vessel's hull to maximize the vessel's propulsive efficiency, thus resulting in fuel savings.
The deal applied to the complete line-up of Mitsubishi Advanced Propellers (MAP) designed by MHI-MME, including the Mark-W, an advanced model delivering outstanding propulsive efficiency.
She said that the two concepts have a propulsive efficiency; in other words, the energy generated by the core engine can be efficiently converted into thrust.
In contrast, the 737MAX not only has an optimised LEAP-1B engine that needs far less engineering penalties because there is no other engine option, it's lighter weight on the 737MAX itself lends itself to better propulsive efficiency, aerodynamics, performance while delivering better redundancy and increased reliability given the robust but less complex engine design through proven carbon ceramic matrix composites -- components that have high durability to allow high cycle operations.
(2010a) have noted strong dependencies, a little bit weaker than in our research (Table 3), between the indices characterizing swimming style such as stroke length, stroke index and propulsive efficiency, despite the fact the indices were calculated in different ways.
For subsonic flight, the propulsive efficiency, [[eta].sub.p] of a turbofan is also higher than that of a turbojet.