Types of Jet engine (Part-2)

April 24, 2023

Types of Jet engine (Part-2)

JET ENGINE (Part-2)

Types of Jet engine

1)Turbojet

2)Turbofan (Fanjet)

3)Ramjet

4)Turboshaft

5)Scramjet

6)General Electric CF34

7)General Electric TF39

5)Scramjet engine

A scramjet (supersonic combustion ramjet) is a variant of a ramjet airbreathing jet engine in which combustion takes place in supersonic airflow. As in ramjets,[1] a scramjet relies on high vehicle speed to compress the incoming air forcefully before combustion , but whereas a ramjet

decelerates the air to subsonic velocities before combustion using shock cones, a scramjet has no shock cone and slows the airflow using shockwaves produced by its ignition source in place of a shock cone.This allows the scramjet to operate efficiently at extremely high speeds

*Speed*

Theoretical projections place the top speed of a scramjet between Mach 12 (14,000 km/h; 8,400 mph) and Mach 24 (25,000 km/h; 16,000 mph).

*Use*

Scramjets are advanced jet engine technology that works at high altitudes and speeds above Mach 5. They can be used as a viable upper stage for affordable space launches in launch vehicles. They can also be used in hypersonic aircraft as a propulsion unit in the future.

6)General Electric CF34

The General Electric CF34 is a civilian high-bypass turbofan developed by GE Aircraft Engines from its TF34 military engine. The CF34 is used on a number of business and regional jets, including the Bombardier CRJ series, the Embraer E-Jets, and Comac ARJ21. In 2012, there were 5,600 engines in service.

*Speed*

It has top speed of 530 mph.

*Use*

The CF34-8C5 is an advanced 14,500 pound thrust class turbofan propulsion system that powers the 90-passenger Bombardier CRJ900 Series airliner, 100- passenger Bombardier CRJ1000 Series airliner and Bombardier Challenger 890 business aircraft.

7)General Electric TF39

The General Electric TF39 was a high-bypass turbofan engine that was developed to power the Lockheed C-5 Galaxy. The TF39 was the first high-power, high-bypass jet engine developed. The TF39 was further developed into the CF6 series of engines, and formed the basis of the LM2500 and LM6000 marine and industrial gas turbine. On September 7, 2017, the last active C-5A powered with TF39 engines made its final flight to Davis-Monthan Air Force Base for retirement.The TF39 was effectively retired, and all remaining active C-5 Galaxys are now powered by F138 (General Electric CF6-80C2) engines.

*Speed*

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*Use*

General electric TF39 are useful for military and civilian transport aircraft where high speed is not a priority. General Electric developed the TF39 in the mid-1960s to power the Lockheed Martin .

*Important Images*