This is in contrast with centrifugal, axi-centrifugal and mixed-flow compressors where the air may enter axially but will have a significant radial component on exit  What is axial flow compressor? These machines are called 'compressible flow machines' and more popularly A centrifugal compressor is a radial flow rotodynamic fluid machine that uses. turbochargers have been built using multi-stage axial flow compressors, for The radial flow (centrifugal) compressor is made up from four basic components.


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Radial flow vs. axial flow compressor - RCU Forums

When the required operating flow exceeds the stonewall limit, the only remedy is to reconfigure the compressor with impellers and matched stationary hardware designed for larger flow rates. Process installation A centrifugal compressor may be configured with radial flow compressor of a variety of process connection arrangements.


For grade-mounted installations, the process connections are most often positioned on the upper half of the casing with the process piping connected from above the compressor.

In some installations, horizontal side connections are employed. The horizontal connection arrangement is frequently used radial flow compressor booster compressors for gas transmission.

A radial split radial flow compressor design see the section on Case above is preferred for these two arrangements. Another arrangement is the mezzanine-mounted configuration. With this type of installation, the compressor connections are on the lower half of the casing, and the process piping is connected from underneath the compressor.

What is the difference between axial flow compressor and centrifugal compressor? - Quora

If the operating pressures are sufficiently low, an axial split case design is appropriate see the subsection on cases. To achieve optimum performance, it is necessary to install the compressor with a sufficiently long straight section of inlet piping upstream of the radial flow compressor inlet flange.

Most compressor manufacturers require that the length of this straight section be at least two times the inlet flange diameter.

The compressor must be well integrated into the entire process so that start-up, operation, and shutdown can be safely controlled. The next section provides a description of control concepts and the process equipment required.

The radial flow compressor elements of the control and safety system illustrated in Fig.

Flow control Most compression processes require the compressor to deliver a relatively constant discharge pressure over a range of capacities. However, the centrifugal compressor characteristic curve from Fig.

The process can control either suction or discharge pressure. If one is fixed, the other will vary as dictated by radial flow compressor compressor characteristic curve.

Centrifugal compressor -

The three radial flow compressor of maintaining a constant discharge pressure for varying capacity are discussed next. Speed control Centrifugal compressor drivers are either of the fixed or variable speed type.

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Most steam or gas turbines and those electric motors equipped with radial flow compressor variable frequency drive system are all available as variable speed drivers. For a given discharge pressure, compressor capacity may be increased by merely increasing the speed of rotation.

Conversely, capacity may be decreased by reducing compressor speed.


Capacity control by speed variation is the most effective way to maximize the operating flexibility of a centrifugal compressor. Suction throttle valves A fixed-speed motor is often the least expensive driver for a centrifugal compressor. When designing a centrifugal compressor driven by a fixed-speed motor, it is necessary to establish the speed based on the operating condition that requires the radial flow compressor capacity for the required discharge pressure.

When operating at lower capacities, the compressor inherently delivers a greater discharge radial flow compressor for a given process suction pressure than desired.

The solution to this problem is to install a throttle valve at the inlet of the compressor.

Suction pressure reduction by throttling increases the pressure ratio required to deliver a given discharge pressure. The economic trade-off for this method of capacity control is additional compressor power vs.


Variable inlet guide vanes As discussed in the section on Stationary Components above, the compressor performance characteristic curve can be adjusted by changing the direction radial flow compressor the flow of gas into the impeller.