## What is the Prandtl Glauert rule?

The rule that the pressure coefficient at any point in the subsonic flow of a fluid about a slender body is equal to the pressure coefficient at that point in the corresponding incompressible fluid flow, divided by √(1 -M 2), where M is the Mach number far from the body.

## What is Prandtl Glauert compressibility correction?

The Prandtl–Glauert transformation is a mathematical technique which allows solving certain compressible flow problems by incompressible-flow calculation methods. It also allows applying incompressible-flow data to compressible-flow cases.

**What is the utility of the prandtl Glauert similarity rule?**

What is the utility of the Prandtl-Glauert similarity rule? ans: It relates the flow at M¥ £ 0.8 to the incompressible flow around the same body.

### What is singularity in aerodynamics?

The Prandtl–Glauert singularity is a theoretical construct in flow physics, often incorrectly used to explain vapor cones in transonic flows. It is the prediction by the Prandtl–Glauert transformation that infinite pressures would be experienced by an aircraft as it approaches the speed of sound.

### What is meant by critical Mach number?

Definition. In aerodynamics, the critical Mach Number (Mcr or Mcrit) of an aircraft is the lowest Mach number at which the airflow over any part of the aircraft reaches the speed of sound.

**What is singularity in fluid?**

H.K.Moffatt. Singularities of the Navier-Stokes equations occur when some derivative of the velocity field is infinite at any point of a field of flow (or, in an evolving flow, becomes infinite at any point within a finite time).

## What is vortex singularity?

Vortex Singularity is an Evolved Reborn-tier upgrader item added in Miner’s Haven’s 6th Anniversary Event in June 2021. It upgrades ore by 9x and flips ore gravity, making them Anti-Gravity if they weren’t already, and vice versa.

## Which pressure increases the exit velocity?

Explanation: Pressure is inversely proportional to the velocity. So, with the increase in pressure, the exit velocity decreases.