The phrase "a vast array of projects" is correct and usable in written English.
It can be used when describing a large and diverse collection of projects in various contexts, such as business, research, or creative endeavors.
Example: "Our organization is currently managing a vast array of projects, ranging from community outreach to technological innovation."
Alternatives: "a wide range of projects" or "a large selection of projects".
Bangladesh relies heavily on Western aid for a vast array of projects that otherwise would not exist.
The Hadoop ecosystem is made up of a vast array of projects built on top of and around the core modules described above.
These issues have motivated the appearance of a vast array of projects that propose specific development plans for the required transmission, together with academic literature that deals with the different theoretical aspects of the problem.
The NIH currently supports a vast array of projects in autism research.
"However, once I stepped into Kurt's archive, I discovered over 200 hours of unreleased music and audio, a vast array of art projects (oil paintings, sculptures), countless hours of never-before-seen home movies and over 4,000 pages of writings that together help paint an intimate portrait of an artist who rarely revealed himself to the media".
That package, developed in partnership with Mr. Obama, includes huge increases in spending on education, aid to states for Medicaid costs, temporary increases in jobless benefits and a vast array of public works projects to create jobs.
Far smaller amounts are provided for a vast array of programs, including water projects, schools, museums and homeless shelters.
The Now Play This festival took place this weekend at Somerset House in London, bringing together a vast array of interesting experimental game projects.
Yet a far larger flow of money into information technology may eventually come from local governments as part of a vast array of stimulus-package investment projects, according to Joaquin Gonzalez, director of research for CivicUS, which advises state and local governments.
She promised a big spending plan to the tune of nearly $300 billion on a vast array of infrastructure building and repair projects; roads, bridges, airports schools, sewer systems and so on.
NATO forces spend money on a vast array of goods and services in addition to projects specifically designed to benefit Afghans, like bridges, roads and schools.
