Consider the following differences between Ramjet and Scramjet Engines:

While scramjet has supersonic airflow, ramjet has subsonic airflow

Both scramjet and ramjet engines have no moving parts

Which of the above statements is/are correct?

Question

While scramjet has supersonic airflow, ramjet has subsonic airflow:
- Scramjet (Supersonic Combustion Ramjet): Scramjet engines operate at supersonic speeds, which means that the airflow entering the engine is traveling at speeds greater than the speed of sound (Mach 1 or higher). Scramjets are specifically designed to efficiently operate at these high speeds, and they rely on supersonic combustion to achieve this.
- Ramjet (Ram-Air Intake Jet): Ramjet engines operate at subsonic speeds, which means that the airflow entering the engine is traveling at speeds less than the speed of sound (typically below Mach 1). Ramjets are designed to compress incoming air using their forward motion, and they rely on subsonic combustion for propulsion.
Both scramjet and ramjet engines have no moving parts: Scramjet and ramjet engines are both examples of air-breathing engines, and one of their distinguishing features is that they have no mechanical moving parts like turbines or compressors. Instead, they rely on the high-speed airflow and the design of their inlet and combustion chambers to achieve compression and combustion of the air-fuel mixture. This lack of moving parts is one of the reasons these engines are often referred to as \"simple\" compared to other types of engines like turbojet or turbofan engines, which have rotating components for air compression and propulsion.

GKToday Admin · Accepted Answer

Both 1 & 2

While scramjet has supersonic airflow, ramjet has subsonic airflow:
- Scramjet (Supersonic Combustion Ramjet): Scramjet engines operate at supersonic speeds, which means that the airflow entering the engine is traveling at speeds greater than the speed of sound (Mach 1 or higher). Scramjets are specifically designed to efficiently operate at these high speeds, and they rely on supersonic combustion to achieve this.
- Ramjet (Ram-Air Intake Jet): Ramjet engines operate at subsonic speeds, which means that the airflow entering the engine is traveling at speeds less than the speed of sound (typically below Mach 1). Ramjets are designed to compress incoming air using their forward motion, and they rely on subsonic combustion for propulsion.
Both scramjet and ramjet engines have no moving parts: Scramjet and ramjet engines are both examples of air-breathing engines, and one of their distinguishing features is that they have no mechanical moving parts like turbines or compressors. Instead, they rely on the high-speed airflow and the design of their inlet and combustion chambers to achieve compression and combustion of the air-fuel mixture. This lack of moving parts is one of the reasons these engines are often referred to as \"simple\" compared to other types of engines like turbojet or turbofan engines, which have rotating components for air compression and propulsion.